[Ltsp-discuss] installation issues

[Robert Lefebvre]

Hi all,

I've been pulling my hair out trying to get Edubuntu to work properly. I am
installing it at a small, private school and am running out of time. Any
help will be greatly appreciated.

 I am using a HP Pavillion Slimeline s5120f with 3.8 GB mem and AMD Athlon
7750 Dual-core Processor X2 as the server. I downloaded and installed the
32 bit version of EdUbuntu. It is connected to a Linksys wrt610N Router
which has its DHCP server enabled. The router itself is on a dedicated IP.
>From the router it goes to one of two nic cards on the server. The other
nic card is a usb to rj45 converter and goes to a 16 port switch and then
on to the clients.

The clients are, for the most part, P4 Dells but have also tested on a
Lenovo laptop and an Acer laptop. I downloaded and burned boot CD from
prebuilt gPXE iso boot  images are from
http://www.rom-o-matic.net/gpxe/gpxe-1.0.1/contrib/rom-o-matic/with
alldrivers



 I have been able to get the clients logged into the server but the
graphics have a broad spectrum of problems ranging from black screen, to
severe resolution problems and even displaying the server's desktop upside
down and reversed on the lenovo laptop.

At first I was thinking all the problems had to do with the server's NVidia
graphics card. Then I was thinking since the clients each handle their own
graphics and the problems had to do with the downloaded gPXE file. Now I am
thinking it is a wrong setting in the Linux iso image that is sent to the
client when they boot telling the connecting client to operate in the wrong
resolution.

Thanks in advance




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Re: [Ltsp-discuss] installation issues

[Robert Lefebvre]

Thanks Rob,

Here is what lts.conf says

[default]
LDM_THEME=edubuntu
LANG=en_US.UTF-8
LANGUAGE=en_US.UTF-8
LDM_LANGUAGE=en_US.UTF-8


I added to it
XSERVER = vesa
X_MODE_0= 1280x1024

but that was a no-no (the server wouldn't boot afterwards). As I am
reinstalling Edubuntu for yet another time I'll mention what may be another
symptom/cause. When installing we are given the option to download updates
as we install. Updating seems to cause edubuntu to not be able to access
the Internet afterwards (not positive but sure seems like it).








On Thu, Aug 9, 2012 at 2:40 PM, Rob Owens  wrote:

> On Thu, Aug 09, 2012 at 02:22:58PM -0400, Robert Lefebvre wrote:
> >
> >  I have been able to get the clients logged into the server but the
> > graphics have a broad spectrum of problems ranging from black screen, to
> > severe resolution problems and even displaying the server's desktop
> upside
> > down and reversed on the lenovo laptop.
> >
> > At first I was thinking all the problems had to do with the server's
> NVidia
> > graphics card. Then I was thinking since the clients each handle their
> own
> > graphics and the problems had to do with the downloaded gPXE file. Now I
> am
> > thinking it is a wrong setting in the Linux iso image that is sent to the
> > client when they boot telling the connecting client to operate in the
> wrong
> > resolution.
> >
> Clients should auto-detect their graphics hardware and load the
> appropriate drivers.  Yours seem to not be doing that.  Perhaps you have
> an outdated version of Edubuntu (or a too-new version that has bugs).
> Or maybe you're just unlucky.  Either way, you can manually specify the
> drivers and resolution in lts.conf.
>
> I think Edubuntu keeps that file in /var/lib/tftpboot, but I'm not sure.
> I also think you need to run another command after editing lts.conf
> (this is related to Edubuntu using a squashed image instead of NFS, like
> my Debian system).  Somebody on this list is sure to know what that
> command is -- I can't remember it.
>
> Anyway, you'll want to run 'man lts.conf' to get some details on how
> that file is structured.  You'll probably want to include something like
> this for your problem clients:
>
> XSERVER = vesa
> X_MODE_0= 1280x1024
>
> vesa is a good xserver value to start with, because it usually works.  It
> is
> slower than others, so once you get things working you may want to try
> other values.  You can specify these settings as default or per-client
> (by MAC address or by hostname, I believe).
>
> -Rob
>
>
> --
> Live Security Virtual Conference
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> threat landscape has changed and how IT managers can respond. Discussions
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> _
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>   https://lists.sourceforge.net/lists/listinfo/ltsp-discuss
> For additional LTSP help,   try #ltsp channel on irc.freenode.net
>



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[Ltsp-discuss] no software/dashboard icons on client

[Robert Lefebvre]

I am a total noob at Edubuntu and even networking in general but I finally
managed to get a client to boot and log into the server but when it does
the desktop is missing any navigation. There is no icons in the top right
that indicate network connection, date, username reboot etc. There are no
program icons in the left menu either.

There is, however, a folder on the desktop titled "untitled folder". It is
filled with the os folders and files.

How do I get the client to display programs?



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Re: [Ltsp-discuss] no software/dashboard icons on client

[Robert Lefebvre]

Hey David,

Hey hey hey HEY!

Yes! That worked like a charm!

I have four test stations set up and rebooted all of them and got the menus
:-)

Your instructions worked flawlessly! Thank you so much!


Adding this to the wiki is an excellent idea because I Googled for a long
time and wasn't able to find anything. It may be because it is a difficult
issue to describe in a short search phrase. I suggest you splatter the
article with as many variants as you can.

Suggestions:

Edubuntu 12.04 No menu
Edubuntu 12.04 No menu after login
Edubuntu 12.04 Desktop  but No menu
Edubuntu 12.04 Desktop  but No menu after login

Edubuntu 12.04 No Ubuntu admin bar
Edubuntu 12.04 No Ubuntu admin bar after login
Edubuntu 12.04 Desktop  but No Ubuntu admin bar
Edubuntu 12.04 Desktop  but No Ubuntu admin bar after login

Edubuntu 12.04 No menu or Ubuntu admin bar
Edubuntu 12.04 No menu or Ubuntu admin bar after login
Edubuntu 12.04 Desktop  but No menu or Ubuntu admin bar
Edubuntu 12.04 Desktop  but No menu or Ubuntu admin bar after login


For clarity on the wiki let me mention that my lts.conf was already there.

It had
[default]
 LDM_THEME=edubuntu
LANG=en_US.UTF-8
LANGUAGE=en_US.UTF-8
LDM_LANGUAGE=en_US.UTF-8

NOTICE (maybe mention in the wiki) there are no quotes in all the current
code. Your code worked with the quotes but I also tested w/o them and it
won't work w/o quotes. A strange result.

So, yes, I am using Edubuntu 12.04. It is at a small private school in
Winter Park, Florida (just north of Orlando). It is a school for special
needs kids and I'll be doing a couple of courses there on building computer
games. The owner's wishes are to get them equipped with applicable skills
and hopefully I'll be able to get them typing, doing basic graphics, simple
coding etc along the way to building a game that they will acquire those
skills.

I am definitely a Moodle fan so that will be my next step (to install
Moodle). Now my research seems to indicate that Edubuntu will not have a
conflict with Moodle. I was concerned there would be because there will be
two servers running (I don't see Apache installed or running). Would you
have some advice on installing Moodle before I attempt it?

Also, are you familiar with the MX180 PC?

$69

We would need a grant of some type to acquire them but the kids would be
able to use them to connect to the lab and could take them home to have as
their own.

http://www.w2comp.com/detail.asp?catid=74585&Pdtid=630954

Thanks again,

Robert




On Sat, Aug 11, 2012 at 1:12 AM, David Amormino
wrote:

>  Are you running version 12.04 of Edubuntu (or Ubuntu)?  What you
> describe is, unfortunately, the normal behavior after installing Ubuntu
> 12.04 as an LTSP server.  It may be true for Edubuntu as well.
>
> Try setting the "session" to "ubuntu 2d".  At the login screen, go to the
> bottom left and click on "Preferences".  Select Session and change from
> "Default" to "Ubuntu 2D".  You should login with the correct Unity panel,
> etc.
>
> If this works, there is a way to make "ubuntu 2d" the default session for
> all users:
>
> I force this by creating the file /var/lib/tftpboot/ltsp/i386/lts.conf
> with the
> contents:
>
> [default]
>  LDM_SESSION="gnome-session --session=ubuntu-2d"
>
> (If you are using a 64-bit client, this file would be
> /var/lib/tftpboot/ltsp/amd64/lts.conf.)
>
> Please comment because I would like to put this information on the
> UbuntuLTSP wiki if many others are having this same issue.
>
> -David Amormino
>
>
> On 08/10/2012 09:08 AM, Robert Lefebvre wrote:
>
> I am a total noob at Edubuntu and even networking in general but I finally
> managed to get a client to boot and log into the server but when it does
> the desktop is missing any navigation. There is no icons in the top right
> that indicate network connection, date, username reboot etc. There are no
> program icons in the left menu either.
>
> There is, however, a folder on the desktop titled "untitled folder". It is
> filled with the os folders and files.
>
> How do I get the client to display programs?
>
>
>
> --
> BungeeBones.com - A B2B Link Exchange - Free Links in limited locations -
> human edited and reviewed - Networked online advertising business
> opportunities available through our free, distributed web directory script
>
>
> --
> Live Security Virtual Conference
> Exclusive live event will cover all the ways today's security and
> threat landscape has changed and how IT managers can respond. Discussions
> will include endpoint security, mobile security and the latest in malware
> threats. http://www.accelacomm.com/jaw/sfrnl0424

Re: [Ltsp-discuss] no software/dashboard icons on client

[Robert Lefebvre]

Hi again,

I was able to get Moodle installed but did it manually. There were a couple
of issues with the EdUbuntu install. I don't know if you are aware of them
or not but

1) EdUbuntu is using an old version (1.9.9) of Moodle so I installed the
newest (2.3.1)

2) Am I wrong and did it to myself or does EdUbuntu install Moodle into
usr/share folder? Somehow the Moodle files ended up there when they should
be in var/www

But it really feels good to have the lab and Moodle up and running. Now on
to building the courses. :-)

Thanks again for your awesome and timely help.

Robert



On Sat, Aug 11, 2012 at 11:32 AM, Robert Lefebvre <
robert.r.lefeb...@gmail.com> wrote:

> Hey David,
>
> Hey hey hey HEY!
>
> Yes! That worked like a charm!
>
> I have four test stations set up and rebooted all of them and got the
> menus :-)
>
> Your instructions worked flawlessly! Thank you so much!
>
>
> Adding this to the wiki is an excellent idea because I Googled for a long
> time and wasn't able to find anything. It may be because it is a difficult
> issue to describe in a short search phrase. I suggest you splatter the
> article with as many variants as you can.
>
> Suggestions:
>
> Edubuntu 12.04 No menu
> Edubuntu 12.04 No menu after login
> Edubuntu 12.04 Desktop  but No menu
> Edubuntu 12.04 Desktop  but No menu after login
>
> Edubuntu 12.04 No Ubuntu admin bar
> Edubuntu 12.04 No Ubuntu admin bar after login
> Edubuntu 12.04 Desktop  but No Ubuntu admin bar
> Edubuntu 12.04 Desktop  but No Ubuntu admin bar after login
>
> Edubuntu 12.04 No menu or Ubuntu admin bar
> Edubuntu 12.04 No menu or Ubuntu admin bar after login
> Edubuntu 12.04 Desktop  but No menu or Ubuntu admin bar
> Edubuntu 12.04 Desktop  but No menu or Ubuntu admin bar after login
>
>
> For clarity on the wiki let me mention that my lts.conf was already there.
>
> It had
> [default]
>  LDM_THEME=edubuntu
> LANG=en_US.UTF-8
> LANGUAGE=en_US.UTF-8
> LDM_LANGUAGE=en_US.UTF-8
>
> NOTICE (maybe mention in the wiki) there are no quotes in all the current
> code. Your code worked with the quotes but I also tested w/o them and it
> won't work w/o quotes. A strange result.
>
> So, yes, I am using Edubuntu 12.04. It is at a small private school in
> Winter Park, Florida (just north of Orlando). It is a school for special
> needs kids and I'll be doing a couple of courses there on building computer
> games. The owner's wishes are to get them equipped with applicable skills
> and hopefully I'll be able to get them typing, doing basic graphics, simple
> coding etc along the way to building a game that they will acquire those
> skills.
>
> I am definitely a Moodle fan so that will be my next step (to install
> Moodle). Now my research seems to indicate that Edubuntu will not have a
> conflict with Moodle. I was concerned there would be because there will be
> two servers running (I don't see Apache installed or running). Would you
> have some advice on installing Moodle before I attempt it?
>
> Also, are you familiar with the MX180 PC?
>
> $69
>
> We would need a grant of some type to acquire them but the kids would be
> able to use them to connect to the lab and could take them home to have as
> their own.
>
> http://www.w2comp.com/detail.asp?catid=74585&Pdtid=630954
>
> Thanks again,
>
> Robert
>
>
>
>
>
> On Sat, Aug 11, 2012 at 1:12 AM, David Amormino <
> david.amorm...@microvu.com> wrote:
>
>>  Are you running version 12.04 of Edubuntu (or Ubuntu)?  What you
>> describe is, unfortunately, the normal behavior after installing Ubuntu
>> 12.04 as an LTSP server.  It may be true for Edubuntu as well.
>>
>> Try setting the "session" to "ubuntu 2d".  At the login screen, go to the
>> bottom left and click on "Preferences".  Select Session and change from
>> "Default" to "Ubuntu 2D".  You should login with the correct Unity panel,
>> etc.
>>
>> If this works, there is a way to make "ubuntu 2d" the default session for
>> all users:
>>
>> I force this by creating the file /var/lib/tftpboot/ltsp/i386/lts.conf
>> with the
>> contents:
>>
>> [default]
>>  LDM_SESSION="gnome-session --session=ubuntu-2d"
>>
>> (If you are using a 64-bit client, this file would be
>> /var/lib/tftpboot/ltsp/amd64/lts.conf.)
>>
>> Please comment because I would like to put this information on the
>> UbuntuLTSP wiki if many others are having this same issue.
>>
>> -David Amormino
>>
>>
>> On 08/10/2012 09:08 AM, Robert Lefebvre wrote:
>>
>&g

Re: [Ltsp-discuss] no software/dashboard icons on client

[Robert Lefebvre]

Hi David,

Well, I had an excellent day with LTSP (for a change). I had been booting
from a cd and was thinking there was a lot of work to get the clients to
boot from the network. Wow was I wrong. Sort of stumbled upon it by
accident that all it takes is changing the boot order in the bios. So, I
went through about ten machines and all except two are booting directly to
the network.

Then the boss (the owner of the school started using the lab from an old
Dell client station and was blown away with how fast it was. It used to be
so slow. Well he was so impressed he started dragging every pc and laptop
out that he could get his hands on and I got about 8 abandoned machines
going.

But the best story was when I came across two basically stripped out pcs.
They had no hard drives, no memory, holes where the floppy used to be, and
no history about what was wrong with them. I found a proper memory stick
and threw it in one and started it up. Wouldn't you know it went right into
a network boot in a snap. I had never done a diskless machine before and
tonight I got my first two built. Way cool.






On Mon, Aug 13, 2012 at 12:40 PM, David Amormino  wrote:

>  Robert,
>
> I hope someone else can comment on Moodle and the MX180 PC for you.  I
> have no experience.  Perhaps e-mail this list with a new Subject.
>
> Thank you for your encouragement; I am somewhat uncomfortable updating the
> Wiki due to inexperience, but I may try.
>
> It has been easier for me to work with LTSP on a 10.04 server than on a
> 12.04 server.  I keep running into undocumented issues on 12.04, so I stick
> with 10.04 which is a shame.  I think the new Unity interface is the
> biggest cause of these problems on 12.04.  Otherwise, 12.04 supports newer
> hardware and applications better than 10.04.
>
> We have been running 25 users on LTSP for about 4 years in a production
> manufacturing environment.
>
> -David
>
>
>
> On 08/11/2012 08:32 AM, Robert Lefebvre wrote:
>
> Hey David,
>
> Hey hey hey HEY!
>
> Yes! That worked like a charm!
>
> I have four test stations set up and rebooted all of them and got the
> menus :-)
>
> Your instructions worked flawlessly! Thank you so much!
>
>
> Adding this to the wiki is an excellent idea because I Googled for a long
> time and wasn't able to find anything. It may be because it is a difficult
> issue to describe in a short search phrase. I suggest you splatter the
> article with as many variants as you can.
>
> Suggestions:
>
> Edubuntu 12.04 No menu
> Edubuntu 12.04 No menu after login
> Edubuntu 12.04 Desktop  but No menu
> Edubuntu 12.04 Desktop  but No menu after login
>
> Edubuntu 12.04 No Ubuntu admin bar
> Edubuntu 12.04 No Ubuntu admin bar after login
> Edubuntu 12.04 Desktop  but No Ubuntu admin bar
> Edubuntu 12.04 Desktop  but No Ubuntu admin bar after login
>
> Edubuntu 12.04 No menu or Ubuntu admin bar
> Edubuntu 12.04 No menu or Ubuntu admin bar after login
> Edubuntu 12.04 Desktop  but No menu or Ubuntu admin bar
> Edubuntu 12.04 Desktop  but No menu or Ubuntu admin bar after login
>
>
> For clarity on the wiki let me mention that my lts.conf was already there.
>
> It had
> [default]
>  LDM_THEME=edubuntu
> LANG=en_US.UTF-8
> LANGUAGE=en_US.UTF-8
> LDM_LANGUAGE=en_US.UTF-8
>
> NOTICE (maybe mention in the wiki) there are no quotes in all the current
> code. Your code worked with the quotes but I also tested w/o them and it
> won't work w/o quotes. A strange result.
>
> So, yes, I am using Edubuntu 12.04. It is at a small private school in
> Winter Park, Florida (just north of Orlando). It is a school for special
> needs kids and I'll be doing a couple of courses there on building computer
> games. The owner's wishes are to get them equipped with applicable skills
> and hopefully I'll be able to get them typing, doing basic graphics, simple
> coding etc along the way to building a game that they will acquire those
> skills.
>
> I am definitely a Moodle fan so that will be my next step (to install
> Moodle). Now my research seems to indicate that Edubuntu will not have a
> conflict with Moodle. I was concerned there would be because there will be
> two servers running (I don't see Apache installed or running). Would you
> have some advice on installing Moodle before I attempt it?
>
> Also, are you familiar with the MX180 PC?
>
> $69
>
> We would need a grant of some type to acquire them but the kids would be
> able to use them to connect to the lab and could take them home to have as
> their own.
>
> http://www.w2comp.com/detail.asp?catid=74585&Pdtid=630954
>
> Thanks again,
>
> Robert
>
>
>
>
>  On Sat, Aug 11, 2012 at 1:12 AM, David Amormi

[Ltsp-discuss] Clients lose Internet access after being idle

[Robert Lefebvre]

I am running the latest version of EdUbuntu in a lab of 12 clients. I have
not nailed the cause for the entire lab losing Internet but I am suspecting
the system is entering a "sleep mode" and cannot restart. Is such a thing
possible?


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will include endpoint security, mobile security and the latest in malware 
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[Ltsp-discuss] tried to change to fat clients and made a mess

[Robert Lefebvre]

Hi all,

Our new network is a bit slow and we traced that to needing some equipment
upgraded (switches and nic cards) but our budget is maxed out. So I figured
I would move some of the stronger client machines to fat client operation
but after the process no clients will boot. They give the error "could not
find kernel image vmlinuz"

To attempt to change to fat client I followed the directions here -
http://jonathancarter.org/2010/11/24/how-do-ltsp-fat-clients-work/
and everything went fine until the last step - restarting dhcp. The
instructions say to use  "/etc/init.d/dhcp3-server restart" but  that
command gives the error "dhcp3-server: command not found" Further research
told me ltsp uses a different dhcp server so I tried " sudo stop
isc-dhcp-server and got
isc-dhcp-server stop/waiting
and then sudo start isc-dhcp-server and got
isc-dhcp-server start/running, process 25078"

Were those restart commands correct and does anyone see anything else in
those instructions that would cause EdUbuntu to break?

I have a bunch of kids coming in the morning for class on these units so I
really could use some help figuring this out please.

Thanks in advance
Robert

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threat landscape has changed and how IT managers can respond. Discussions 
will include endpoint security, mobile security and the latest in malware 
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Re: [Ltsp-discuss] tried to change to fat clients and made a mess

[Robert Lefebvre]

It was a good idea and I gave it a try but still get the error "could not
find kernel image vmlinuz"

I was reading that Debian will re generate an image on its own (the
instructions I initially used said to order that done on the cl) .

I've got two "linuz" type files in my boot directory
vmlinuz-3.2.0-23-generic-pae and  vmlinuz-3.2.0-29-generic-pae

There is also what looked like a vmlinuz directory there but ls -l reveals
it is something I am not familiar with - perhaps a symlink? that forwards
to the first file above (vmlinuz-3.2.0-23-generic-pae).

ls -l reports this about vmlinuz

lrwxrwxrwx   1 root root33 Aug 11 14:09 vmlinuz ->
boot/vmlinuz-3.2.0-23-generic-pae

The properties of vmlinuz-3.2.0-29-generic-pae and
vmlinuz-3.2.0-23-generic-pae are different too ...
-rw-r--r-- 1 root root  5015840 Apr 23 11:41 vmlinuz-3.2.0-23-generic-pae
-rw--- 1 root root  5010176 Jul 27 14:35 vmlinuz-3.2.0-29-generic-pae

AND I didn't even have the server installed on April 23?

I hope the error can be found.



On Sun, Aug 26, 2012 at 7:50 PM, Todd O'Bryan  wrote:

> That looks right. Have you tried rebooting the server, just to clear
> out the cobwebs?
>
> On Sun, Aug 26, 2012 at 7:20 PM, Robert Lefebvre
>  wrote:
> > Hi all,
> >
> > Our new network is a bit slow and we traced that to needing some
> equipment
> > upgraded (switches and nic cards) but our budget is maxed out. So I
> figured
> > I would move some of the stronger client machines to fat client operation
> > but after the process no clients will boot. They give the error "could
> not
> > find kernel image vmlinuz"
> >
> > To attempt to change to fat client I followed the directions here -
> > http://jonathancarter.org/2010/11/24/how-do-ltsp-fat-clients-work/
> > and everything went fine until the last step - restarting dhcp. The
> > instructions say to use  "/etc/init.d/dhcp3-server restart" but  that
> > command gives the error "dhcp3-server: command not found" Further
> research
> > told me ltsp uses a different dhcp server so I tried " sudo stop
> > isc-dhcp-server and got
> > isc-dhcp-server stop/waiting
> > and then sudo start isc-dhcp-server and got
> > isc-dhcp-server start/running, process 25078"
> >
> > Were those restart commands correct and does anyone see anything else in
> > those instructions that would cause EdUbuntu to break?
> >
> > I have a bunch of kids coming in the morning for class on these units so
> I
> > really could use some help figuring this out please.
> >
> > Thanks in advance
> > Robert
> >
> > --
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> >
>
>
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Re: [Ltsp-discuss] tried to change to fat clients and made a mess

[Robert Lefebvre]

Perhaps it may be of value to mention I had backed up /opt/ltsp/i386

I did that because the fat client install procedure kept getting an error
that i386 was already present. I tried to replace the current new one with
the original but still got the same error and nothing changed.







On Sun, Aug 26, 2012 at 8:43 PM, Robert Lefebvre <
robert.r.lefeb...@gmail.com> wrote:

> It was a good idea and I gave it a try but still get the error "could not
> find kernel image vmlinuz"
>
> I was reading that Debian will re generate an image on its own (the
> instructions I initially used said to order that done on the cl) .
>
> I've got two "linuz" type files in my boot directory
> vmlinuz-3.2.0-23-generic-pae and  vmlinuz-3.2.0-29-generic-pae
>
> There is also what looked like a vmlinuz directory there but ls -l reveals
> it is something I am not familiar with - perhaps a symlink? that forwards
> to the first file above (vmlinuz-3.2.0-23-generic-pae).
>
> ls -l reports this about vmlinuz
>
> lrwxrwxrwx   1 root root33 Aug 11 14:09 vmlinuz ->
> boot/vmlinuz-3.2.0-23-generic-pae
>
> The properties of vmlinuz-3.2.0-29-generic-pae and
> vmlinuz-3.2.0-23-generic-pae are different too ...
> -rw-r--r-- 1 root root  5015840 Apr 23 11:41 vmlinuz-3.2.0-23-generic-pae
> -rw--- 1 root root  5010176 Jul 27 14:35 vmlinuz-3.2.0-29-generic-pae
>
> AND I didn't even have the server installed on April 23?
>
> I hope the error can be found.
>
>
>
>
> On Sun, Aug 26, 2012 at 7:50 PM, Todd O'Bryan wrote:
>
>> That looks right. Have you tried rebooting the server, just to clear
>> out the cobwebs?
>>
>> On Sun, Aug 26, 2012 at 7:20 PM, Robert Lefebvre
>>  wrote:
>> > Hi all,
>> >
>> > Our new network is a bit slow and we traced that to needing some
>> equipment
>> > upgraded (switches and nic cards) but our budget is maxed out. So I
>> figured
>> > I would move some of the stronger client machines to fat client
>> operation
>> > but after the process no clients will boot. They give the error "could
>> not
>> > find kernel image vmlinuz"
>> >
>> > To attempt to change to fat client I followed the directions here -
>> > http://jonathancarter.org/2010/11/24/how-do-ltsp-fat-clients-work/
>> > and everything went fine until the last step - restarting dhcp. The
>> > instructions say to use  "/etc/init.d/dhcp3-server restart" but  that
>> > command gives the error "dhcp3-server: command not found" Further
>> research
>> > told me ltsp uses a different dhcp server so I tried " sudo stop
>> > isc-dhcp-server and got
>> > isc-dhcp-server stop/waiting
>> > and then sudo start isc-dhcp-server and got
>> > isc-dhcp-server start/running, process 25078"
>> >
>> > Were those restart commands correct and does anyone see anything else in
>> > those instructions that would cause EdUbuntu to break?
>> >
>> > I have a bunch of kids coming in the morning for class on these units
>> so I
>> > really could use some help figuring this out please.
>> >
>> > Thanks in advance
>> > Robert
>> >
>> > --
>> > BungeeBones.com - A B2B Link Exchange - Free Links in limited locations
>> -
>> > human edited and reviewed - Networked online advertising business
>> > opportunities available through our free, distributed web directory
>> script
>> >
>> >
>> --
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>> > Exclusive live event will cover all the ways today's security and
>> > threat landscape has changed and how IT managers can respond.
>> Discussions
>> > will include endpoint security, mobile security and the latest in
>> malware
>> > threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
>> > _
>> > Ltsp-discuss mailing list.   To un-subscribe, or change prefs, goto:
>> >   https://lists.sourceforge.net/lists/listinfo/ltsp-discuss
>> > For additional LTSP help,   try #ltsp channel on irc.freenode.net
>> >
>>
>>
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>> threat landscape has changed and how IT managers can respond. Discussions
>> will include endpoint se

Re: [Ltsp-discuss] tried to change to fat clients and made a mess

[Robert Lefebvre]

Thank you Jacob - got it back five minutes before the kids came. :-)



On Mon, Aug 27, 2012 at 6:14 AM, Jakob Unterwurzacher wrote:

> ltsp-update-image




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[Ltsp-discuss] Need advice about server purchase

[Robert Lefebvre]

Hi all,

We are going to upgrade our server and had one in mind. It has plenty of
memory and a gigabit lan (we'll need another) but the question I had was
about the 6 core processor it has.

AMD-FX6100, 6Cores processor with 14MB cache.
Core 1 speed = 4.0Ghz
Core 2 speed = 4.0Ghz
Core 3 speed = 4.0Ghz
Core 4 speed = 4.0Ghz
Core 5 speed = 4.0Ghz
Core 6 speed = 4.0Ghz
Total processing speed (6X4ghz = 24 Ghz)
Core temperature = (70'F to 90'F )
Heat sink and fans (AMD original copper pipes heat-sink & it support up to
8 cores processors with speed 4.0Ghz)

We are only running 20 thin clients but want to get another 30 by year's
end.

My main question is whether the 6 cores are better for a lab. I'm thinking
it would because requests come in from many different clients.





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[Ltsp-discuss] changed nic card and lost client connections

[Robert Lefebvre]

Hey all,

I'm a noob at networking and Edubuntu but am starting to grasp it (I think
:-).

I just changed the server over from using a USB to rj45 ethernet connector
to a pci express gigabit network card and am having problems getting it
re-connected to the clients. At the client I'm getting the EdUbuntu
landing/login page but w/o the input for just a couple of seconds and then
get this error :

BusyBox v1.18.5 (Ubuntu 1:1.18.5-1ubuntu4) built-in shell (ash)
Enter 'help' for a list of built-in commands.
(initramfs)



I'm attempting to use "eth2" (i.e. the new gigabit card) connected to the
client network. I was able to get onboard eth0 connected to the Internet.


I've got the /etc/ltsp/dhcpd.conf file set like this

#
# Default LTSP dhcpd.conf config file.
#

authoritative;

subnet 192.168.0.0 netmask 255.255.255.0 {
range 192.168.0.20 192.168.0.250;
option domain-name "example.com";
option domain-name-servers 192.168.0.0;
option broadcast-address 192.168.0.255;
option routers 192.168.0.0;
#next-server 192.168.0.1;
#get-lease-hostnames true;
option subnet-mask 255.255.255.0;
option root-path "/opt/ltsp/i386";
if substring( option vendor-class-identifier, 0, 9 ) = "PXEClient" {
filename "/ltsp/i386/pxelinux.0";
} else {
filename "/ltsp/i386/nbi.img";
}

I ran the "ifconfig" command on the cl and got this:
eth0  Link encap:Ethernet  HWaddr 00:24:8c:a9:d0:cd
  inet addr:24.73.154.245  Bcast:24.73.154.255  Mask:255.255.255.248
  inet6 addr: fe80::224:8cff:fea9:d0cd/64 Scope:Link
  UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
  RX packets:1499 errors:0 dropped:0 overruns:0 frame:0
  TX packets:1527 errors:0 dropped:0 overruns:0 carrier:0
  collisions:0 txqueuelen:1000
  RX bytes:762797 (762.7 KB)  TX bytes:253913 (253.9 KB)
  Interrupt:44 Base address:0x8000

eth2  Link encap:Ethernet  HWaddr 00:0a:cd:1f:bb:95
  inet addr:192.168.0.0  Bcast:192.168.0.255  Mask:255.255.255.0
  inet6 addr: fe80::20a:cdff:fe1f:bb95/64 Scope:Link
  UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
  RX packets:0 errors:0 dropped:0 overruns:0 frame:0
  TX packets:110 errors:0 dropped:0 overruns:0 carrier:0
  collisions:0 txqueuelen:1000
  RX bytes:0 (0.0 B)  TX bytes:9061 (9.0 KB)
  Interrupt:43 Base address:0xa000

loLink encap:Local Loopback
  inet addr:127.0.0.1  Mask:255.0.0.0
  inet6 addr: ::1/128 Scope:Host
  UP LOOPBACK RUNNING  MTU:16436  Metric:1
  RX packets:590 errors:0 dropped:0 overruns:0 frame:0
  TX packets:590 errors:0 dropped:0 overruns:0 carrier:0
  collisions:0 txqueuelen:0
  RX bytes:82713 (82.7 KB)  TX bytes:82713 (82.7 KB)

lxcbr0Link encap:Ethernet  HWaddr 8a:3b:78:9d:e9:f7
  inet addr:10.0.3.1  Bcast:10.0.3.255  Mask:255.255.255.0
  inet6 addr: fe80::883b:78ff:fe9d:e9f7/64 Scope:Link
  UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
  RX packets:0 errors:0 dropped:0 overruns:0 frame:0
  TX packets:76 errors:0 dropped:0 overruns:0 carrier:0
  collisions:0 txqueuelen:0
  RX bytes:0 (0.0 B)  TX bytes:8116 (8.1 KB)

*I ran *

sudo service isc-dhcp-server start

*
Might this all be related to my previous botched attempt at setting the
server up to create fat clients?*

I Googled the error and it was saying the error was tied to a block being
wrong or broken. When the fat client change was reversed the network was
still up afterward.

Thanks in advance



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Re: [Ltsp-discuss] changed nic card and lost client connections

[Robert Lefebvre]

n I rebooted and got the same - No DHCP

Any help will be greatly appreciated.



On Sun, Sep 2, 2012 at 2:38 PM, rob  wrote:

>   I am not sure that this will solve the issue, but it is what I'd try:
>
>   Usually when a nic is added a new line for that card is put to this file:
> /etc/udev/rules.d/70-persistent-net.rules .
>   you could edit that file and
>1- delete the line for the old usb nic [ assuming you are not going to
> use it ].
>2- change the new nic line to eth1  [ it is probably assigned to be
>  eth2 ]
>3- reboot.
>
>   Unless you edited /etc/network/interfaces ?
>
>
> PS: usually I just delete /etc/udev/rules.d/70-persistent-net.rules  , and
> on
> reboot it gets recreated. The thing is you never know for sure which of
> the 2
> nics is eth0 or eth1 . But swapping the patch cable fixes that.
>
>
>
> On Sun, 2 Sep 2012, Robert Lefebvre wrote:
>
> > Hey all,
> >
> > I'm a noob at networking and Edubuntu but am starting to grasp it (I
> think
> > :-).
> >
> > I just changed the server over from using a USB to rj45 ethernet
> connector
> > to a pci express gigabit network card and am having problems getting it
> > re-connected to the clients. At the client I'm getting the EdUbuntu
> > landing/login page but w/o the input for just a couple of seconds and
> then
> > get this error :
> >
> > BusyBox v1.18.5 (Ubuntu 1:1.18.5-1ubuntu4) built-in shell (ash)
> > Enter 'help' for a list of built-in commands.
> > (initramfs)
> >
> >
> >
> > I'm attempting to use "eth2" (i.e. the new gigabit card) connected to the
> > client network. I was able to get onboard eth0 connected to the Internet.
> >
> >
> > I've got the /etc/ltsp/dhcpd.conf file set like this
> >
> > #
> > # Default LTSP dhcpd.conf config file.
> > #
> >
> > authoritative;
> >
> > subnet 192.168.0.0 netmask 255.255.255.0 {
> >range 192.168.0.20 192.168.0.250;
> >option domain-name "example.com";
> >option domain-name-servers 192.168.0.0;
> >option broadcast-address 192.168.0.255;
> >option routers 192.168.0.0;
> > #next-server 192.168.0.1;
> > #get-lease-hostnames true;
> >option subnet-mask 255.255.255.0;
> >option root-path "/opt/ltsp/i386";
> >if substring( option vendor-class-identifier, 0, 9 ) = "PXEClient" {
> >filename "/ltsp/i386/pxelinux.0";
> >} else {
> >filename "/ltsp/i386/nbi.img";
> >}
> >
> > I ran the "ifconfig" command on the cl and got this:
> > eth0  Link encap:Ethernet  HWaddr 00:24:8c:a9:d0:cd
> >  inet addr:24.73.154.245  Bcast:24.73.154.255
>  Mask:255.255.255.248
> >  inet6 addr: fe80::224:8cff:fea9:d0cd/64 Scope:Link
> >  UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
> >  RX packets:1499 errors:0 dropped:0 overruns:0 frame:0
> >  TX packets:1527 errors:0 dropped:0 overruns:0 carrier:0
> >  collisions:0 txqueuelen:1000
> >  RX bytes:762797 (762.7 KB)  TX bytes:253913 (253.9 KB)
> >  Interrupt:44 Base address:0x8000
> >
> > eth2  Link encap:Ethernet  HWaddr 00:0a:cd:1f:bb:95
> >  inet addr:192.168.0.0  Bcast:192.168.0.255  Mask:255.255.255.0
> >  inet6 addr: fe80::20a:cdff:fe1f:bb95/64 Scope:Link
> >  UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
> >  RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> >  TX packets:110 errors:0 dropped:0 overruns:0 carrier:0
> >  collisions:0 txqueuelen:1000
> >  RX bytes:0 (0.0 B)  TX bytes:9061 (9.0 KB)
> >  Interrupt:43 Base address:0xa000
> >
> > loLink encap:Local Loopback
> >  inet addr:127.0.0.1  Mask:255.0.0.0
> >  inet6 addr: ::1/128 Scope:Host
> >  UP LOOPBACK RUNNING  MTU:16436  Metric:1
> >  RX packets:590 errors:0 dropped:0 overruns:0 frame:0
> >  TX packets:590 errors:0 dropped:0 overruns:0 carrier:0
> >  collisions:0 txqueuelen:0
> >  RX bytes:82713 (82.7 KB)  TX bytes:82713 (82.7 KB)
> >
> > lxcbr0Link encap:Ethernet  HWaddr 8a:3b:78:9d:e9:f7
> >  inet addr:10.0.3.1  Bcast:10.0.3.255  Mask:255.255.255.0
> >  inet6 addr: fe80::883b:78ff:fe9d:e9f7/64 Scope:Link
> >  UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
> >  RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> >  TX pa

[Ltsp-discuss] where/how to repair missing pxelinux.cfg/default

[Robert Lefebvre]

Could someone please explain to me how to go about fixing the error when
booting the client and it reports

"TFTP prefix: /ltsp/i386/
Trying to load: pxelinux.cfg/default
Could not find kernel image: vmlinuz"

I can see vmlinuz at the root level but can't find pxelinux.cfg and tried
making one and putting it in both ltsp/i386 and also created a directory
named tftpboot and placed pxelinux.cfg in it.



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Re: [Ltsp-discuss] changed nic card and lost client connections

[Robert Lefebvre]

I was able to resolve this. I found a tiny reference to the file at

 etc/default where the  eth number was set to eth2 rather than the new eth1.





On Sun, Sep 2, 2012 at 8:04 PM, Robert Lefebvre  wrote:

> Hi,
> Now I get the different error that "No DHCP or ProxyDHCP offers were
> received"
>
> Re: "usually I just delete /etc/udev/rules.d/70-
>
>> persistent-net.rules  , and on
>> reboot it gets recreated"
>
>
> I tried renaming persistent-net.rules instead but that didn't work and it
> didn't recreate the file after being renamed and rebooted. I commented out
> eth1 and changed eth2 (assigned to the new gigabit nic) to eth1.
>
> I basically started over and ran sudo ifconfig eth1 192.168.0.0 netmask
> 255.255.255.0
> I ran sudo ifconfig eth0 24.73.154.245 netmask 255.255.255.248 to make
> sure eth0 was right.
>
>
> 
> You mentioned etc/network/interfaces
>
> Here is what it has
>
> auto lo eth0
> iface lo inet loopback
> iface eth0 inet static
> address 24.73.154.245
> netmask 255.255.255.248
> broadcast 24.73.154.255
> network 24.73.154.240
>
> 
> I installed and ran ethtool and it reported this about eth1
>
> Settings for eth1:
> Supported ports: [ TP MII ]
> Supported link modes:   10baseT/Half 10baseT/Full
> 100baseT/Half 100baseT/Full
> 1000baseT/Half 1000baseT/Full
> Supported pause frame use: No
> Supports auto-negotiation: Yes
> Advertised link modes:  10baseT/Half 10baseT/Full
> 100baseT/Half 100baseT/Full
> 1000baseT/Half 1000baseT/Full
> Advertised pause frame use: Symmetric Receive-only
> Advertised auto-negotiation: Yes
> Link partner advertised link modes:  10baseT/Half 10baseT/Full
>  100baseT/Half 100baseT/Full
>  1000baseT/Full
> Link partner advertised pause frame use: Symmetric
> Link partner advertised auto-negotiation: Yes
> Speed: 1000Mb/s
> Duplex: Full
> Port: MII
> PHYAD: 0
> Transceiver: internal
> Auto-negotiation: on
> Supports Wake-on: pumbg
> Wake-on: g
> Current message level: 0x0033 (51)
>drv probe ifdown ifup
> Link detected: yes
>
> 
> ran ifconfig
>
>
> eth0  Link encap:Ethernet  HWaddr 00:24:8c:a9:d0:cd
>   inet addr:24.73.154.245  Bcast:24.73.154.247
> Mask:255.255.255.248
>
>   inet6 addr: fe80::224:8cff:fea9:d0cd/64 Scope:Link
>   UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>   RX packets:7579 errors:0 dropped:0 overruns:0 frame:0
>   TX packets:7041 errors:0 dropped:0 overruns:0 carrier:0
>   collisions:0 txqueuelen:1000
>   RX bytes:4765006 (4.7 MB)  TX bytes:1534151 (1.5 MB)
>   Interrupt:44 Base address:0xa000
>
> eth1  Link encap:Ethernet  HWaddr 00:0a:cd:1f:bb:95
>   inet addr:192.168.0.0  Bcast:192.168.0.255  Mask:255.255.255.0
>   UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>   RX packets:78 errors:0 dropped:0 overruns:0 frame:0
>   TX packets:691 errors:0 dropped:0 overruns:0 carrier:0
>   collisions:0 txqueuelen:1000
>   RX bytes:22452 (22.4 KB)  TX bytes:33419 (33.4 KB)
>
>   Interrupt:43 Base address:0xa000
>
> loLink encap:Local Loopback
>   inet addr:127.0.0.1  Mask:255.0.0.0
>   inet6 addr: ::1/128 Scope:Host
>   UP LOOPBACK RUNNING  MTU:16436  Metric:1
>   RX packets:3565 errors:0 dropped:0 overruns:0 frame:0
>   TX packets:3565 errors:0 dropped:0 overruns:0 carrier:0
>   collisions:0 txqueuelen:0
>   RX bytes:1328495 (1.3 MB)  TX bytes:1328495 (1.3 MB)
>
> lxcbr0Link encap:Ethernet  HWaddr 2a:6d:3f:e7:1c:66
>   inet addr:10.0.3.1  Bcast:10.0.3.255  Mask:255.255.255.0
>   inet6 addr: fe80::286d:3fff:fee7:1c66/64 Scope:Link
>
>   UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>   RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>   TX packets:157 errors:0 dropped:0 overruns:0 carrier:0
>   collisions:0 txqueuelen:0
>   RX bytes:0 (0.0 B)  TX bytes:14031 (14.0 KB)
> _
>
> I ran ltsp-updat

[Ltsp-discuss] I'm really soured on Edubuntu

[Robert Lefebvre]

Getting edubuntu has been one of the most exhausting exercises at what
seems to be futility (at least right now). I talked this school to invest
in it and it is turning into a complete failure. Since the beginning it has
been nothing but one problem after another. Its like playing womp-a-mole. I
fix one problem and another pops up.

Earlier today I tried installing fat clients for the third time only to be
greeted with yet another crash. This time the screen was completely black
and I could see no sense in trying to recover it. I re-installed everything
over again - edubuntu, apache, mysql, php, webmin and still have moodle and
wordpress to go.

The only problem is   yet another couple issues .

Out of six machines that were working previously two booted to the Edubuntu
desktop but had no launchpad for the programs. Probably a misconfiguration
somewhere.

Two others boot into the desktop but then go black  h.

The other two don't want to accept the network kernel for some reason and
miss the network boot and boot to the hard drive. I hate to say it but
those windows screens are looking better each time.



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Re: [Ltsp-discuss] I'm really soured on Edubuntu

[Robert Lefebvre]

Thanks Rob,

I may do that on the new server we are supposed to be getting. In the mean
time I have to get this running for the kids by a.m. I'm keeping busy
checking the cabling as a previous post suggested. This all started when I
switched from t100 nic and switches to t1000.



On Mon, Sep 3, 2012 at 7:34 PM, Rob Owens  wrote:

> On Mon, Sep 03, 2012 at 05:13:45PM -0400, Robert Lefebvre wrote:
> > Getting edubuntu has been one of the most exhausting exercises at what
> > seems to be futility (at least right now). I talked this school to invest
> > in it and it is turning into a complete failure. Since the beginning it
> has
> > been nothing but one problem after another. Its like playing
> womp-a-mole. I
> > fix one problem and another pops up.
> >
> Give Debian a try.  Administration will be very similar to Edubuntu.
> Debian releases are typically very well-tested (more than Ubuntu
> releases).  Possible stumbling blocks will be your potential need for
> non-free software, which is not included by default in Debian.
>
> I only suggest trying a different distro because you stated that you are
> soured on Edubuntu.
>
> You might want to try installing Wheezy instead of Squeeze (the current
> stable release).  Wheezy is "frozen" and will be the next stable
> release.  It has newer LTSP-related packages than Squeeze.  But on the
> other hand, Squeeze has been very well-tested and will have security
> updates for at least a year (a year after Wheezy is released as Stable).
>
> I'm currently using LTSP on Squeeze, but I don't do much with it besides
> web browsing and listening to music.
>
> -Rob
>
>
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Re: [Ltsp-discuss] I'm really soured on Edubuntu

[Robert Lefebvre]

>/etc/network/interfaces


auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
  address 192.168.0.254
  netmask 255.255.255.0


My /var/lib/tftpboot/ltsp/i386/lts.conf
is different than what you wrote

# lts.conf, provided by Edubuntu installer
# see http://edubuntu.org/documentation for more information

[default]
  LDM_THEME=edubuntu
  LANG=en_US.UTF-8
  LANGUAGE=en_US.UTF-8
  LDM_LANGUAGE=en_US.UTF-8

But I did see the pxelinux.cfg/default file I was looking for the other day.

Since I re-installed Edubuntu 12.04 today the only issue seems to be the
lack of the launcher. Are there any alternatives to the launch bar? If I
change from gnome desktop would that make a difference?


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Re: [Ltsp-discuss] I'm really soured on Edubuntu

[Robert Lefebvre]

Ok, I found it -- sort of.

If I change the session manager (down in the lower right corner of the
login screen) and tell it to run in 2d then I get the launcher back.

I just need to find out how to make that the default for the kids.




On Mon, Sep 3, 2012 at 9:35 PM, Robert Lefebvre  wrote:

>
>
> >/etc/network/interfaces
>
>
> auto lo
> iface lo inet loopback
>
> auto eth0
> iface eth0 inet static
>   address 192.168.0.254
>   netmask 255.255.255.0
>
>
> My /var/lib/tftpboot/ltsp/i386/lts.conf
> is different than what you wrote
>
> # lts.conf, provided by Edubuntu installer
> # see http://edubuntu.org/documentation for more information
>
> [default]
>   LDM_THEME=edubuntu
>   LANG=en_US.UTF-8
>   LANGUAGE=en_US.UTF-8
>   LDM_LANGUAGE=en_US.UTF-8
>
> But I did see the pxelinux.cfg/default file I was looking for the other
> day.
>
> Since I re-installed Edubuntu 12.04 today the only issue seems to be the
> lack of the launcher. Are there any alternatives to the launch bar? If I
> change from gnome desktop would that make a difference?
>
>
>
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Re: [Ltsp-discuss] I'm really soured on Edubuntu

[Robert Lefebvre]

Hi everyone,

Well, it gets even stranger ...  but in a good way.

I experimented with the CompizConfig Settings Manager because it is the GUI
for the default display right? And all over the place (in the comments, in
the package's landing page) it has dire warnings it could crash your system.

Well, I was going to try to "tone down" the display so decided to give it a
try. When I did I lost the menu on the server gui. Thought I was a goner.

But as it turned out, I may have found a safety device to that problem with
CompizConfig Settings Manager. You see, I had set up with two admins. I
signed in with the other admin and, fortunately, still had my old desktop.

There are a number of reports of people losing their system while using
CompizConfig Settings Manager. This procedure of setting up a second admin
with every one of the permissions as the first enabled me to save the
system. If more tests confirm this then perhaps it should become part of
the installation procedure.







On Tue, Sep 4, 2012 at 6:27 AM, Jakob Unterwurzacher wrote:

> On Tue, Sep 4, 2012 at 4:08 AM, rob  wrote:
>
>> I saved this to try sometime:
>>
>> [default]
>>LDM_SESSION="gnome-session --session=ubuntu-2d"
>>
>
> Yes, something like that should work.
>
> However, that the default install is just broken, and there is no
> information in the release notes
> https://wiki.edubuntu.org/PrecisePangolin/ReleaseNotes/Edubuntu
> makes me wonder: Has anybody reported that problem to Ubuntu? (i.e.
> launchpad.net)
>
>
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Re: [Ltsp-discuss] I'm really soured on Edubuntu

[Robert Lefebvre]

That ( LDM_SESSION="gnome-session --session=ubuntu-2d")
fixed it! Thanks!  I had already started explaining to the students how to
go to preferences and change the session but that was causing them some
confusion. Thanks!

Everything seems stable now.



On Mon, Sep 3, 2012 at 10:08 PM, rob  wrote:

> I saved this to try sometime:
>
> [default]
>LDM_SESSION="gnome-session --session=ubuntu-2d"
>
> try that
>
> On Mon, 3 Sep 2012, Robert Lefebvre wrote:
>
> > Ok, I found it -- sort of.
> >
> > If I change the session manager (down in the lower right corner of the
> > login screen) and tell it to run in 2d then I get the launcher back.
> >
> > I just need to find out how to make that the default for the kids.
> >
> >
> >
> >
> > On Mon, Sep 3, 2012 at 9:35 PM, Robert Lefebvre <
> robert.r.lefeb...@gmail.com
> >> wrote:
> >
> >>
> >>
> >>> /etc/network/interfaces
> >>
> >>
> >> auto lo
> >> iface lo inet loopback
> >>
> >> auto eth0
> >> iface eth0 inet static
> >>   address 192.168.0.254
> >>   netmask 255.255.255.0
> >>
> >>
> >> My /var/lib/tftpboot/ltsp/i386/lts.conf
> >> is different than what you wrote
> >>
> >> # lts.conf, provided by Edubuntu installer
> >> # see http://edubuntu.org/documentation for more information
> >>
> >> [default]
> >>   LDM_THEME=edubuntu
> >>   LANG=en_US.UTF-8
> >>   LANGUAGE=en_US.UTF-8
> >>   LDM_LANGUAGE=en_US.UTF-8
> >>
> >> But I did see the pxelinux.cfg/default file I was looking for the other
> >> day.
> >>
> >> Since I re-installed Edubuntu 12.04 today the only issue seems to be the
> >> lack of the launcher. Are there any alternatives to the launch bar? If I
> >> change from gnome desktop would that make a difference?
> >>
> >>
> >>
> >> --
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> -
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> script
> >>
> >
> >
> >
> >
>
>
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[Ltsp-discuss] DansGuardian added to Edubuntu 12.04 - Is it a good idea?

[Robert Lefebvre]

I don't want to risk breaking our installation so I am wondering if anyone
has any information about using DansGuardian along with the Edubuntu LTSP?

Thanks




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Re: [Ltsp-discuss] Possible to have separate non-ltsp path to Internet?

[Robert Lefebvre]

Hi Dave,

Well right now we have two gigabit nic cards on the server, one handles the
Internal network while the other goes directly to a static IP.  And there
is also a 100t onboard nic but that has been deactivated but I would like
to make that available to non-ltsp machines since there won't be too many
of those.



On Fri, Sep 21, 2012 at 6:10 PM, David Burgess  wrote:

> On Fri, Sep 21, 2012 at 4:02 PM, Robert Lefebvre
>  wrote:
> > Is it possible to offer a separate Internet connection through the
> network
> > that bypasses the Edubuntu DHCP server?
>
> Yes, and how you do it depends on your network configuration. I have
> set up an LTSP network where the LTSP server had only a single network
> interface. Clients that PXE-booted received an LTSP boot image, while
> non-PXE clients had "normal" access to the network and internet.
>
> db
>
>
> --
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Re: [Ltsp-discuss] Possible to have separate non-ltsp path to Internet?

[Robert Lefebvre]

Hi Jay,

It sounds like "You can configure the existing LTSP DHCP server to handout
IP addresses and a unique gateway to non-PXE clients." is the way I need to
go.

How do I do that (how do configure the dhcp server to handout IP addresses
and a unique gateway to non-pxe clients)?


Here is my current dhcp config file ...

#
# Default LTSP dhcpd.conf config file.
#

authoritative;

subnet 192.168.0.0 netmask 255.255.255.0 {
range 192.168.0.20 192.168.0.250;
option domain-name "example.com";
option domain-name-servers 192.168.0.1;
option broadcast-address 192.168.0.255;
option routers 192.168.0.1;
#next-server 192.168.0.1;
#get-lease-hostnames true;
option subnet-mask 255.255.255.0;
option root-path "/opt/ltsp/i386";
if substring( option vendor-class-identifier, 0, 9 ) = "PXEClient" {
filename "/ltsp/i386/pxelinux.0";
} else {
filename "/ltsp/i386/nbi.img";
}
}


One thing I am concerned about is whether activating the currently
de-activated on board nic card will cause all the configurations of the
LTSP server to become trashed. I deactivated the on board nic during
install when it appeared that it was defaulting to eth0 and I couldn't
quite figure out how to leave it while still configuring the two pcie
gigabit nic cards. Is there a way to activate it so that it is named eth2
from the start? Or, if not, will I only have to assign new names to it and
the other two nics in the etc/udev/rules.d/70-persistent.net.rules file?
What I am afraid of is activating the onboard nic and Edubuntu creates a
bunch of automatic config files that I won't be able to correct.

Thanks too.

Robert


On Sun, Sep 23, 2012 at 10:42 AM, Jay Goldberg wrote:

> Hi Robert,
>
> I believe that the gateway can always be a machine or router that is
> separate from the LTSP server.
>
> Assuming that you are running thin clients, meaning that all of the thin
> clients _are_ the server, they will all have the same IP when we are
> talking about connecting to the open Internet from an LTSP terminal. In
> fact, thin clients don't even use NAT as you probably realize, they don't
> need to route anywhere except to the LTSP server.
>
> You can configure the existing LTSP DHCP server to handout IP addresses
> and a unique gateway to non-PXE clients. On this gateway you would run
> a hotspot product such as ChiliSpot. The gateway could very well be run on
> your extra eth2 or whatever.
>
> You would also have the option of assigning a different subnet for your
> non-PXE clients, you may want to do this for organization and security.
>
> Regards,
>
> On Fri, Sep 21, 2012 at 6:24 PM, Robert Lefebvre <
> robert.r.lefeb...@gmail.com> wrote:
>
>> Hi Dave,
>>
>> Well right now we have two gigabit nic cards on the server, one handles
>> the Internal network while the other goes directly to a static IP.  And
>> there is also a 100t onboard nic but that has been deactivated but I would
>> like to make that available to non-ltsp machines since there won't be too
>> many of those.
>>
>>
>>
>>
>> On Fri, Sep 21, 2012 at 6:10 PM, David Burgess  wrote:
>>
>>> On Fri, Sep 21, 2012 at 4:02 PM, Robert Lefebvre
>>>  wrote:
>>> > Is it possible to offer a separate Internet connection through the
>>> network
>>> > that bypasses the Edubuntu DHCP server?
>>>
>>> Yes, and how you do it depends on your network configuration. I have
>>> set up an LTSP network where the LTSP server had only a single network
>>> interface. Clients that PXE-booted received an LTSP boot image, while
>>> non-PXE clients had "normal" access to the network and internet.
>>>
>>> db
>>>
>>>
>>> --
>>> Got visibility?
>>> Most devs has no idea what their production app looks like.
>>> Find out how fast your code is with AppDynamics Lite.
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>>>
>>
>>
>>
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Re: [Ltsp-discuss] Grant write privileges to PHP to the etc/passwd

[Robert Lefebvre]

Hey, thanks for all the great replies.

The reason for using PHP is that I use the list of registered users in
Ubuntu as the "master" data list for a number of present and future custom
website functionality. For example, the PHP pulls the list and creates a
form to manage their electives. Their actual choices vary each day so I use
PHP and Mysql to maintain a db with their classes. I also use PHP to
provide multilevel access (i.e. different for students, parents, teachers
and admin) to the web pages for such things as forms, news, resources etc.
The passwd file works great  as a "read source" since only registered
students will be given access to the web pages. There are some other
benefits as well to using php and a database.

All the command line code is great, but unless someone can tell me how to
let these php pages write to the command line then I would have to not only
give the teachers access to it but would actually have to teach the
teachers to code and, well, they already think I'm way over the edge as far
as "geekiness" and they would be certainly less than enthusiastic students
for sure.

I'll definitely study up on the programs and methods suggested. Off the
cuff (before studying those recommendations) it sounds like adding PHP to
sudoers would work but can I scale back the permissions from total sudo to
a less functional sudo?

Thanks

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Re: [Ltsp-discuss] Grant write privileges to PHP to the etc/passwd

[Robert Lefebvre]

This is all great resources. Thanks and I'll follow up with the results.

Another thought was to only make the sudoers file accessible to php and not
add php as a sudo user. If/when the script was run, I could have php write
to sudoers to add itself. Then when the script was done it could rewrite
again and remove itself. The benefit would be that it can only add itself
as a sudo user (and not any other user) whereas if I grant php sudo access
anyone hacking php could create a user and give it sudo access too.
Definitely not perfect, just one extra layer perhaps.

On Mon, Nov 12, 2012 at 3:04 AM, Jan Middelkoop wrote:

> On 10-11-12 02:35, Robert Lefebvre wrote:
> > There are some other benefits as well to using php and a database.
>
> 100% agreed.  Besides everything already suggested, the best solution
> for this IMVHO is still to use LDAP (lightweight directory access
> protocol).
>
> https://help.ubuntu.com/community/OpenLDAPServer
>
> PHP already has a very nice interface with LDAP, which can do everything
> you want.
>
> http://www.php.net/ldap
>
> Right now you're basically recreating the LDAP interface PHP has already
> so it'll work with /etc/passwd.  This is very counter-productive.  LDAP
> might seem more complicated than creating something yourself, but in the
> long run it will make your system much more robust, portable and it will
> give you lots of extra features that might be useful in the future (such
> as replication to multiple servers).
>
> Kindest regards,
>
> Jan Middelkoop
> Recreatie en Zorg Groep B.V.
>
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>
>
>
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Re: [Ltsp-discuss] Grant write privileges to PHP to the etc/passwd

[Robert Lefebvre]

Thanks Jan. Will definitely do that.

On Mon, Nov 12, 2012 at 8:40 AM, Jan Middelkoop wrote:

> As suggested, you could create a script that specifically does what you
> want, and only give PHP sudo access to that specific script.  That would
> be more secure than what you're suggesting.
>
> However.. -> LDAP.
>
> Kindest regards,
>
> Jan Middelkoop
> Recreatie en Zorg Groep B.V.
>
> --
> Website: http://www.recreatie-zorg.nl/
> E-mail: j...@recreatie-zorg.nl
> Telephone: +31 10 714 22 97
>
>
> Op 12-11-12 14:27, Robert Lefebvre schreef:
> > Another thought was to only make the sudoers file accessible to php
> > and not add php as a sudo user. If/when the script was run, I could
> > have php write to sudoers to add itself. Then when the script was done
> > it could rewrite again and remove itself. The benefit would be that it
> > can only add itself as a sudo user (and not any other user) whereas if
> > I grant php sudo access anyone hacking php could create a user and
> > give it sudo access too. Definitely not perfect, just one extra layer
> > perhaps.
>
>
>
> --
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Re: [Ltsp-discuss] Grant write privileges to PHP to the etc/passwd

[Robert Lefebvre]

Hello everybody,

I've begun researching your suggestions and I am leaning towards the
openLDAP suggestion. I need some help with direction of my further research
please.

I should have little problem installing  it in Edubuntu 12.04 as it s
included in the Software Center. And I should have little problem coding to
it with PHP as the concepts are basically the same as interacting with
MySql. And I get how to add users and such to the LDAP database. But how do
I tell Edubuntu to only use the users from the LDAP list?
Thanks.



On Mon, Nov 12, 2012 at 8:47 AM, Robert Lefebvre <
robert.r.lefeb...@gmail.com> wrote:

> Thanks Jan. Will definitely do that.
>
>
> On Mon, Nov 12, 2012 at 8:40 AM, Jan Middelkoop wrote:
>
>> As suggested, you could create a script that specifically does what you
>> want, and only give PHP sudo access to that specific script.  That would
>> be more secure than what you're suggesting.
>>
>> However.. -> LDAP.
>>
>> Kindest regards,
>>
>> Jan Middelkoop
>> Recreatie en Zorg Groep B.V.
>>
>> --
>> Website: http://www.recreatie-zorg.nl/
>> E-mail: j...@recreatie-zorg.nl
>> Telephone: +31 10 714 22 97
>>
>>
>> Op 12-11-12 14:27, Robert Lefebvre schreef:
>> > Another thought was to only make the sudoers file accessible to php
>> > and not add php as a sudo user. If/when the script was run, I could
>> > have php write to sudoers to add itself. Then when the script was done
>> > it could rewrite again and remove itself. The benefit would be that it
>> > can only add itself as a sudo user (and not any other user) whereas if
>> > I grant php sudo access anyone hacking php could create a user and
>> > give it sudo access too. Definitely not perfect, just one extra layer
>> > perhaps.
>>
>>
>>
>> --
>> Everyone hates slow websites. So do we.
>> Make your web apps faster with AppDynamics
>> Download AppDynamics Lite for free today:
>> http://p.sf.net/sfu/appdyn_d2d_nov
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>>
>
>
>
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Re: [Ltsp-discuss] ltsp as an android app

[Robert Lefebvre]

>
> >LDM is a piece of software that runs on the client hardware, and uses SSH
> to
> >connect to the server.
>

I don't understand this as we run about forty thin clients and they boot
with PXE and we don't put any software on them?

>
> >It's probably not feasible to run as an android app, as it is a login
> manager,
> >and will start a desktop environment that will likely fight with the
> running
> >Android OS.
>

I would assume as a login manager that it merely lets things happen after
authentication but the events that are allowed are only what is programmed.
If  only software functionality compatable with the Android kernel were
allowed then there should be any fight. I'm thinking an SSH tunnel bringing
in X11 data from the server. Android can handle X11 ok can't it?

Also, at the Ubuntu site they offer two Ubuntu/Android apps. (
https://one.ubuntu.com/downloads/android/). Both of these are just as, if
not more, complicated than what is needed to run as a thin client aren't
they?

>
> >It's also complicated to set up LDM in a non-LTSP environment unless you
> really
> >understand it well.

Well I definitely don't understand it but when my current clients boot, PXE
and LTSP deliver them a login screen, that's all. That doesn't seem too
complicated to me but since there isn't anything out there yet to use these
Android devices as thin clients it must be complicated or it would have
been done.

>You might want to first try setting it up on a more
> >conventional computer with your preferred operating system installed
> before
> >getting into installing it into a more unusual environment.
>

I agree totally but I've been looking for Non-PXE alternatives to connect
to the server but haven't found any. I have Ubuntu as the operating system
on my laptop but I also change the bios and network boot to the server with
it. So, it then has a totally different OS running than the one on its hard
drive. One approach, then, may be to reboot an Android device and have it
then load a new Linux kernel. That would make the client operate just like
all other clients and would not be affected by any subsequent Android
modifications.

>
> >There are some thin-client options built for Raspberry PI, or you could
> possibly
> >build an LTSP environment with raspbian:
>
> I have checked that out and have tried a little to get it to work and
tried it with the MK802 mini PC I also have but what strikes me about the
approach is how I don't have to make different boot images for my current
clients even though they have different processors (Intel and Amd),
different Nic cards, etc. I would think we should probably need two or
three versions for tablet devices and micro PCs  - one for Android, one for
Apple and one for Microsoft

>
> Alternately, maybe use Debian's armel port with a kernel from raspbian.
>
> Good luck!
>
>
> live well,
>   vagrant
>
>
> --
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> BUILD Helping you discover the best ways to construct your parallel
> projects.
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Re: [Ltsp-discuss] ltsp as an android app

[Robert Lefebvre]

Thank you everybody. I think we have some really good discussion going and
hopefully some people with the skills can step forward and build some of
the needed parts that could make all this easier and enable widespread use
of these devices as thin clients. At our school, for example, I just built
my first LTSP lab and the owner is estatic about the cost savings and the
quality. But I look at these devices at $30-40 each (and retail at that)
and see that low cost computer labs are right at our finger tips.

>PXE is used to download software off the network... the software it
downloads in
>an LTSP environment is typically a linux kernel and an initramfs, which in
turn
>load other software off of the network, which typically loads LDM, a piece
of
>software... which connects to the server using other software... I'm
telling
>you, it's software all the way down.

My background is web development rather than server admin and I've heard we
had a similar situation back during the 'browser wars'. The solution then
was also software based - they used javascript to detect the browser and
delivered the proper code depending on the browser detected. It seems the
solution to this current issue should be some type of detection software to
detect the type of device. Such a solution could adapt to even as yet
undeveloped hardware. Once the hardware type is identified, developers
could deliver the kernel in some sort of modular approach. What I mean is
large chunks of the kernel should/could be reused by different devices with
intermittent customized kernel code applicable to the devices. It seems the
current approach is for every developer, for every device, to start from
scratch.

While there has been plenty of warnings away from developing the needed
boot process because of the complexity it just seems strange that there is,
indeed, such a complexity given that Droid is linux based?



On Tue, Dec 4, 2012 at 2:26 AM, Vagrant Cascadian wrote:

> On Tue, Dec 04, 2012 at 12:04:01AM -0500, Robert Lefebvre wrote:
> > >LDM is a piece of software that runs on the client hardware, and uses
> SSH
> > >to connect to the server.
> >
> >
> > I don't understand this as we run about forty thin clients and they boot
> with
> > PXE and we don't put any software on them?
>
> PXE is used to download software off the network... the software it
> downloads in
> an LTSP environment is typically a linux kernel and an initramfs, which in
> turn
> load other software off of the network, which typically loads LDM, a piece
> of
> software... which connects to the server using other software... I'm
> telling
> you, it's software all the way down.
>
> LTSP itself is not actually a single piece of software, it's a collection
> of
> software to boot an OS off the network- so it can't really be an android
> app,
> per se. You could maybe create a chroot environment that was essentially an
> LTSP installation, or maybe even a chroot from a network mount... and
> connect
> to services provided by an LTSP server...
>
>
> > Well I definitely don't understand it but when my current clients boot,
> PXE and
> > LTSP deliver them a login screen, that's all.
>
> I'm glad we've developed something that looks so simple on the surface. :)
>
> In many ways, LTSP has probably become more complicated than it needs to
> be,
> as the codebase has evolved over the years...
>
> I've been an LTSP developer for over 7 years now, gotten support for
> building
> arm LTSP/qemu on an x86 server in Debian, helped get a couple arm kernel
> variants into Debian... We've got a long way to go before arm based thin
> clients are straightforward... though it's looking a lot more feasible than
> just a few years ago.
>
>
> > That doesn't seem too complicated
> > to me but since there isn't anything out there yet to use these Android
> devices
> > as thin clients it must be complicated or it would have been done.
>
> So it is, and it isn't...
>
> There's nothing technically infeasible about it, a very capable person
> could
> patch together all the bits and pieces... although supporting arm devices
> tend
> to be a bit more fussy as not all the support has been merged in the
> mainline
> linux kernel, and while multiple different arm devices could use the same
> root
> filesystem, typically each device or family of arm devices requires a
> separate
> kernel. The capabilities of a given arm device vary widely, and aren't
> necessarily consistant (i.e. they may boot from network (with some one-off
> protocol, or with PXE), or from media such as an SD card, USB, SATA, etc.).
>
> They don't tend to be genera

Re: [Ltsp-discuss] ltsp as an android app

[Robert Lefebvre]

I came across this step by step tutorial on running Ubuntu and Android
together on the same smartphone.  While that is not the same as running
ltsp with as Android app it sounds like it may contain a lot of the key
pieces of the puzzle. And considering that the smart phones are a lot more
locked down than the devices such as the Raspeberry Pi, MK802 and tablets
(which all allow root access) the steps outlined in the how to should be
easier.

This is my first app experience and am trying to get up to speed with using
Eclipse. I'll let everyone know how it turns out.





On Mon, Dec 3, 2012 at 2:36 PM, Robert Lefebvre  wrote:

> I've purchased three android devices - two micro PCs (MK802 and Raspberry
> PI) and have an Android tablet. Since none of the devices have PXE to
> boot to the LTSP network I need another method.
>
> I was wondering if it were possible to make an Android app to connect to
> LTSP. I am thinking I need an Android app that will connect to the LTSP
> LDM. Is that the right place to start such an APP?
>
> If so, then I am thinking that because there are many Android apps already
> that will create SSH connections, then the App would include one of those
> to connect to the LDM. I've never built an Android app so am looking for
> both general guidance and specific suggestions.
>
> Also, am wondering if FUSE is something that may play a role in getting
> such an app to work. If so, would FUSE be installed in the LDM or in the
> APP?
>
> Thanks
>
>
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Re: [Ltsp-discuss] ltsp as an android app

[Robert Lefebvre]

Forgot the link ... sorry 

http://www.saurik.com/id/10

On Fri, Dec 7, 2012 at 2:35 PM, Robert Lefebvre  wrote:

> I came across this step by step tutorial on running Ubuntu and Android
> together on the same smartphone.  While that is not the same as running
> ltsp with as Android app it sounds like it may contain a lot of the key
> pieces of the puzzle. And considering that the smart phones are a lot more
> locked down than the devices such as the Raspeberry Pi, MK802 and tablets
> (which all allow root access) the steps outlined in the how to should be
> easier.
>
> This is my first app experience and am trying to get up to speed with
> using Eclipse. I'll let everyone know how it turns out.
>
>
>
>
>
>
> On Mon, Dec 3, 2012 at 2:36 PM, Robert Lefebvre <
> robert.r.lefeb...@gmail.com> wrote:
>
>> I've purchased three android devices - two micro PCs (MK802 and Raspberry
>> PI) and have an Android tablet. Since none of the devices have PXE to
>> boot to the LTSP network I need another method.
>>
>> I was wondering if it were possible to make an Android app to connect to
>> LTSP. I am thinking I need an Android app that will connect to the LTSP
>> LDM. Is that the right place to start such an APP?
>>
>> If so, then I am thinking that because there are many Android apps
>> already that will create SSH connections, then the App would include one of
>> those to connect to the LDM. I've never built an Android app so am looking
>> for both general guidance and specific suggestions.
>>
>> Also, am wondering if FUSE is something that may play a role in getting
>> such an app to work. If so, would FUSE be installed in the LDM or in the
>> APP?
>>
>> Thanks
>>
>>
>> --
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Re: [Ltsp-discuss] Is ltsp-cluster still being developed?

[Robert Lefebvre]

I noticed the same thing. I've been wanting to get clustering into our
school for a while and haven't been able to yet. I've looked at clustering
and also at MAAS. I'm not sure which is the better approach.

I guess it all starts with setting up the LDAP server doesn't it?

On Sat, Mar 2, 2013 at 2:12 AM, Dr. Sichendra Bista wrote:

> I checked https://www.ltsp-cluster.org and does not seem to be updated
> for more than two years.
>
> I am wondering whether the project is still alive or integrated with
> ltsp main trunc? Thanks!
>
> Webocratically yours,
> Sichendra Bista
> Chairman
> Human Development Institute
> http://www.career-checkup-clinic.com
> http://www.thehumanape.com
> http://www.giis.org.np
> http://eParliament.org
>
>
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[Ltsp-discuss] MIT's Scratch Program In An LTSP

[Robert Lefebvre]

Is there anyone out there with experience running Scratch in an LTSP
network?

I installed it in our school's network last year and it works but ...

the users can't save anything locally.

They can open an account at MIT and save it to their system but it would be
better if they could save it to our own server.

Has anyone been able to get Scratch to save locally?

Thanks in advance

Robert

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Re: [Ltsp-discuss] MIT's Scratch Program In An LTSP

[Robert Lefebvre]

Hi Matt,

We're using Ubuntu 12.04 but in a LTSP network.

I get a "pop up" type error panel titled "Message not understood:
findTokens:

Then it has three "buttons" that say "Proceed" "Abandon" "Debug" but the
same error message is produced

The first line in the error message reads

 "UndefinedObject(Object)>>error:
UndefinedObject(Object)doesNotUnderstand"

The debugger expands the report a bit -

|t2|
(t2  <- Processor activeProcess errorHandler) notNil
ifTrue; [t2 value: t1 value: self]
ifFalse:
   [Debugger
  openContext: thisContext
  label: t1
  contents: thisContext shortStack
 ^ self]

We're going ahead and using it but with the added hassle of getting the
kids to set up accounts at MIT to save them there aaargh :-)





On Fri, Aug 23, 2013 at 8:43 AM, Matt Johnson  wrote:

> Hi Robert,
>
> We've used Google Scratch successfully for a year on Ubuntu 12.04LTS. Is
> that the same thing? What OS you running?
>
> I've not come across any problems saving at all.
>
> We're using it as a local app but I'm pretty sure we ran it on the server
> before that.
>
> --
> Matt
>
>
> On 22 August 2013 01:53, Robert Lefebvre wrote:
>
>> Is there anyone out there with experience running Scratch in an LTSP
>> network?
>>
>> I installed it in our school's network last year and it works but ...
>>
>> the users can't save anything locally.
>>
>> They can open an account at MIT and save it to their system but it would
>> be better if they could save it to our own server.
>>
>> Has anyone been able to get Scratch to save locally?
>>
>> Thanks in advance
>>
>> Robert
>>
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Re: [Ltsp-discuss] MIT's Scratch Program In An LTSP

[Robert Lefebvre]

On Fri, Aug 23, 2013 at 12:59 PM, Matt Johnson  wrote:

> Update, upgrade and install software into the chroot
>
> sudo ltsp-chroot -m -r; export 
> http_proxy=http://xxx.xxx.xxx.xxx:80
>
> apt-get update
>
> apt-get upgrade
> apt-get install gnome-session-fallback ubuntu-restricted-extras firefox
> hydrogen mypaint audacity vlc tuxmath epoptes-client tuxpaint scratch


Hey Matt, Thanks for the reply again.

I installed it late last year and maybe I didn't update the chroot
properly. I'm not all that well acquanted with it either. In your code on
the chroot, you are using a proxy. We don't so do I just leave that config
off or do I substitute our server's IP?

Update, upgrade and install software into the chroot

sudo ltsp-chroot -m -r; export
http_proxy=http://xxx.xxx.xxx.xxx:80

apt-get update

apt-get upgrade
apt-get install gnome-session-fallback ubuntu-restricted-extras firefox
hydrogen mypaint audacity vlc tuxmath epoptes-client tuxpaint scratch


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Re: [Ltsp-discuss] MIT's Scratch Program In An LTSP

[Robert Lefebvre]

Here is lts.conf

# lts.conf, provided by Edubuntu installer
# see http://edubuntu.org/documentation for more information

[default]
  LDM_THEME=edubuntu
  LANG=en_US.UTF-8
  LANGUAGE=en_US.UTF-8
  LDM_LANGUAGE=en_US.UTF-8
LDM_DIRECTX="false"
LDM_XSESSION="gnome-session --session=ubuntu-2d"
#LDM_XSESSION="gnome-session --session=classic-gnome"

That was PERFECT timing. I was trying to remember where the config was to
change the desktop.

I was going to try out the LXDE desktop. I used it on another install and
it seems quicker.

But on that topic, do some programs work on one desktop while others won't?
We were having problems on the other install with X2Go and it worked great
on LXDE.

Also, back on Epoptes, I want to make sure ... so you are saying you can
see their screen and can broadcast to them whether they are thin or fat
right?

And thanks again for the help.

One more thing ... if I wanted the clients to boot to an Apache (localhost)
web page instead of the login how would I go about that? Any ideas?

Thanks


On Mon, Aug 26, 2013 at 8:53 PM, Matt Johnson  wrote:

>
>
>
> On 27 August 2013 00:37, Robert Lefebvre wrote:
>
>> Hey Matt,
>>
>> Well it was so long ago a lot of the install details are fuzzy. But I
>> haven't been running anything as local apps. I would like to take some of
>> the load off the server with that except we use the Epoptes program alot to
>> keep the kids towing the line. I don't think epoptes would let me see what
>> they are looking at as a fat client but am not positive. Anyway, no fat
>> clients  so I don't need to worry about chroot.
>>
>
> Epoptes works on fat clients. It gets installed into the chroot. (However,
> there's a difference between running some applications locally on thin
> clients and running the whole client as a fat client. For example, on our
> network we have 32 old machines running as thin clients with Firefox
> running as a local app, and we have another 32 new machines running as fat
> clients. Epoptes works on both types.)
>
>
>>
>> I don't remember where I got the download from ... just thought to check
>> my default download folder and it has a Scratch file there
>> scratch_1.4.0.6~dfsg1-4.debian.tar.bz2 . I also checked from the cl by
>> doing apt-get install and it reported back the latest version was
>> installed. I'm still guessing but my hunch would be I gotr the file from
>> MIT. So do you think that is the issue? Simple enough to try BRB sorry to
>> keep you waiting :-)
>>
>
> It's interesting you have the download file. I wonder if the issue is
> linked to a broken Scratch install though I'm out of my level of
> understanding here. Guessing, sorry. For example, it could be because you
> are using the install from the debian tar ball on ubuntu? Complete guess.
>
>
>>
>> It would have been an easy enough fix but it didn't work.
>>
>> I got these errors with the cl install:
>> Processing triggers for shared-mime-info ...
>> Unknown media type in type 'all/all'
>> Unknown media type in type 'all/allfiles'
>> Unknown media type in type 'uri/mms'
>> Unknown media type in type 'uri/mmst'
>> Unknown media type in type 'uri/mmsu'
>> Unknown media type in type 'uri/pnm'
>> Unknown media type in type 'uri/rtspt'
>> Unknown media type in type 'uri/rtspu'
>>
>
> I found this, so I suspect these particular install errors aren't causing
> a problem and could be a red herring...
>
> http://ubuntuforums.org/showthread.php?t=1979924
>
> With the screenshot and more info, I'm hoping someone else can pitch in
> with some clues. There must be a difference between your set up and mine
> that is causing this.
>
> Post your lts.conf.
>
> What happens if you run Scratch actually sitting at the server? Same issue?
>
> --
> Matt
>
>
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Re: [Ltsp-discuss] MIT's Scratch Program In An LTSP

[Robert Lefebvre]

I never picked up that local apps was not the same as fat client. So I
looked up local apps and it has this:

If you are using a 2-interface LTSP setup, a thin client will probably not
be able to get to the internet using local apps. The solution is to set
your LTSP server up as a router so you can access the internet through it.
Some instructions are available at:
https://help.ubuntu.com/community/UbuntuLTSP/ThinClientHowtoNAT/


-> If you are using a 2-interface LTSP setup

Means if I am running two nic cards? Yes I am, so in order to run FF
locally do I have to install NAT?


On Tue, Aug 27, 2013 at 9:55 AM, Matt Johnson  wrote:

>
>
> On 27 Aug 2013, at 14:21, Robert Lefebvre 
> wrote:
>
> Here is lts.conf
>
> # lts.conf, provided by Edubuntu installer
> # see http://edubuntu.org/documentation for more information
>
> [default]
>   LDM_THEME=edubuntu
>   LANG=en_US.UTF-8
>   LANGUAGE=en_US.UTF-8
>   LDM_LANGUAGE=en_US.UTF-8
> LDM_DIRECTX="false"
> LDM_XSESSION="gnome-session --session=ubuntu-2d"
> #LDM_XSESSION="gnome-session --session=classic-gnome"
>
>
> All looks pretty standard. I was wondering if you were using any extra
> mounts, but no.
>
> (You might choose to switch directx to TRUE for better performance. It is
> less secure so worth reading about first.)
>
>
> That was PERFECT timing. I was trying to remember where the config was to
> change the desktop.
>
>
> I was going to try out the LXDE desktop. I used it on another install and
> it seems quicker.
>
> But on that topic, do some programs work on one desktop while others
> won't? We were having problems on the other install with X2Go and it worked
> great on LXDE.
>
>
> Sorry, no experience on that. We use gnome fallback on all clients.
>
>
> Also, back on Epoptes, I want to make sure ... so you are saying you can
> see their screen and can broadcast to them whether they are thin or fat
> right?
>
>
> Correct. Yes. The set up is trivial and done centrally installing it in
> the chroot. For using on fat clients you need to run this from the chroot
> after installing epoptes-client to generate a certificate:
>
> epoptes-client -c
>
> But I'm also saying you don't need to go the whole hog and move to fat
> clients in order to let some load off the server. Have you tried running
> some apps as local apps on your thin clients? Eg Firefox, scratch...
>
>
>
> And thanks again for the help.
>
> One more thing ... if I wanted the clients to boot to an Apache
> (localhost) web page instead of the login how would I go about that? Any
> ideas?
>
>
> I do something similar for a staffroom calendar onto a 42" screen. In
> lts.conf, I've configured a specific machine by mac address to auto login
> as a 'staffroom' user. Then on that 'staffroom' user's desktop, I've
> configured Firefox to auto start and open a specific page for that user at
> login.
>
> --
> Matt
>
>
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Re: [Ltsp-discuss] MIT's Scratch Program In An LTSP

[Robert Lefebvre]

Ahhh, ok, it just clicked what they are saying. We do have two nics, one is
for internal, on for the Internet. Don't need NAT though. And never thought
of the setup as being a router but guess it is.

Along the lines of setting up local apps, I'm trying to build the client
chroot with this -

To run an additional app locally, just install it in the chroot and update
the image:
sudo chroot /opt/ltsp/i386
sudo apt-get install 
sudo ltsp-update-image

but neither firefox nor scratch can be found and generate error

Reading state information... Done
E: Unable to locate package firefox

I'm running a 64 bit server but the clients are set up to run as 32 bit.

Any ideas why the server can't find the apps to install them? I'm stumped



I got the install instructs from here but they are for version 10.10

https://wiki.ubuntu.com/LTSPLocalAppSetup



On Wed, Aug 28, 2013 at 7:36 AM, Matt Johnson  wrote:

>
>
>
> On 27 August 2013 15:47, Robert Lefebvre wrote:
>
>> I never picked up that local apps was not the same as fat client. So I
>> looked up local apps and it has this:
>>
>> If you are using a 2-interface LTSP setup, a thin client will probably
>> not be able to get to the internet using local apps. The solution is to set
>> your LTSP server up as a router so you can access the internet through it.
>> Some instructions are available at:
>> https://help.ubuntu.com/community/UbuntuLTSP/ThinClientHowtoNAT/
>>
>>
>> -> If you are using a 2-interface LTSP setup
>>
>> Means if I am running two nic cards? Yes I am, so in order to run FF
>> locally do I have to install NAT?
>>
>
> I believe so but our server only has one NIC, so I've never had to do
> this. I also believe you'd need to do this in your case to allow fat
> clients to connect to the internet (not just to get local apps to connect
> to the internet).
>
> --
> Matt
>
>
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Re: [Ltsp-discuss] MIT's Scratch Program In An LTSP

[Robert Lefebvre]

a, have to THEM there first Thanks :-)



On Thu, Aug 29, 2013 at 3:31 AM, Matt Johnson  wrote:

>
>
>
> On 29 August 2013 00:07, Robert Lefebvre wrote:
>
>> Ahhh, ok, it just clicked what they are saying. We do have two nics, one
>> is for internal, on for the Internet. Don't need NAT though. And never
>> thought of the setup as being a router but guess it is.
>>
>
> Interesting. I would say you do need NAT for local apps and fat clients,
> but I have never had to do this (one card in server).
>
>
>
>>
>> Along the lines of setting up local apps, I'm trying to build the client
>> chroot with this -
>>
>> To run an additional app locally, just install it in the chroot and
>> update the image:
>> sudo chroot /opt/ltsp/i386
>> sudo apt-get install 
>> sudo ltsp-update-image
>>
>> but neither firefox nor scratch can be found and generate error
>>
>> Reading state information... Done
>> E: Unable to locate package firefox
>>
>> I'm running a 64 bit server but the clients are set up to run as 32 bit.
>>
>> Any ideas why the server can't find the apps to install them? I'm stumped
>>
>
> Here's my notes on the subject (proxy removed) - note the first part:
>
>
> Add Software and Applications
>
> Copy apt sources to chroot
>
> sudo cp /etc/apt/sources.list /opt/ltsp/i386/etc/apt/sources.list
>
> sudo apt-get update
>
> Install software to server
>
> sudo apt-get update
>
> apt-get install gnome-session-fallback ubuntu-restricted-extras hydrogen
> mypaint audacity vlc tuxmath tuxpaint cups-pdf scratch epoptes
>
> Update, upgrade and install software into the chroot
>
> sudo ltsp-chroot -m -r <http://wf1.thegrid.org.uk:80>
>
> apt-get update
>
> apt-get upgrade
>
> apt-get install gnome-session-fallback ubuntu-restricted-extras firefox
> hydrogen mypaint audacity vlc tuxmath epoptes-client tuxpaint scratch
>
> Get epoptes certificate from the server (from the chroot)
>
> epoptes-client -c
>
> Reimage and restart services
>
> sudo ltsp-update-image; sudo ltsp-update-sshkeys; sudo service nbd-server
> restart; sudo service tftpd-hpa restart; sudo service isc-dhcp-server
> restart
>
> Hope that helps.
>
>
> --
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>
>


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Re: [Ltsp-discuss] MIT's Scratch Program In An LTSP

[Robert Lefebvre]

Everything in your instructions was EXCELLENT. The program list you had me
move to local was great. I'm going to add some resource intensive graphics
programs like Gimp and Blender to local also.

BUT lol, the original problem with Scratch is still with me but we are
getting different symptoms and I think I know the cause but can't figure
out the solution.

1) Scratch is displaying a blank white screen
2) Firefox has been shifted to local operation but Chromium (which is also
on our network) was not
3) After configuring local_apps Firefox lost the ability to play Flash
videos
4) After configuring local_apps Chromium (not a local app) continued to
play Flash videos
4) Scratch requires Flash

So, I was trying to figure out how to fix Flash Player on the local app. In
the install of local apps you gave me it include  ubuntu-restricted-extras
which should handle flash issues.

I also changed the desktop to LXDE.

Here is my new lts.conff

# lts.conf, provided by Edubuntu installer
# see http://edubuntu.org/documentation for more information

[default]
  LDM_THEME=edubuntu
  LANG=en_US.UTF-8
  LANGUAGE=en_US.UTF-8
  LDM_LANGUAGE=en_US.UTF-8
#added on tuesday august 27, 2013
#RM_SYSTEM_SERVICES="dnsmasq mysql nbd-server epoptes"
 #USE_LOCAL_SWAP
LOCAL_APPS="true"
#SHUTDOWN_TIME="19:00:00"
LOCALDEV="true"
LDM_DIRECTX="true"
#LDM_XSESSION="gnome-session --session=ubuntu-2d"
#LDM_XSESSION="gnome-session --session=classic-gnome"
LDM_XSESSION=/usr/bin/startlxde



When I commented out LDM_DIRECTX="true" I got Flash back for Firefox.

BUT Scratch still only shows a white screen.

It still works on the server but it is still acting the way it used to
(i.e. won't save locally).

Might this be related --- When I start Scratch, the Icon in the launcher
reads Squeak. I remember Scratch uses Squeak and was installed at the same
time by the Ubuntu Software center. I can't do it now because school is in
session and students are logged in but am thinking I need to install Squeak
to the chroot too.



On Thu, Aug 29, 2013 at 6:38 AM, Robert Lefebvre <
robert.r.lefeb...@gmail.com> wrote:

> a, have to THEM there first Thanks :-)
>
>
>
> On Thu, Aug 29, 2013 at 3:31 AM, Matt Johnson wrote:
>
>>
>>
>>
>> On 29 August 2013 00:07, Robert Lefebvre wrote:
>>
>>> Ahhh, ok, it just clicked what they are saying. We do have two nics, one
>>> is for internal, on for the Internet. Don't need NAT though. And never
>>> thought of the setup as being a router but guess it is.
>>>
>>
>> Interesting. I would say you do need NAT for local apps and fat clients,
>> but I have never had to do this (one card in server).
>>
>>
>>
>>>
>>> Along the lines of setting up local apps, I'm trying to build the client
>>> chroot with this -
>>>
>>> To run an additional app locally, just install it in the chroot and
>>> update the image:
>>> sudo chroot /opt/ltsp/i386
>>> sudo apt-get install 
>>> sudo ltsp-update-image
>>>
>>> but neither firefox nor scratch can be found and generate error
>>>
>>> Reading state information... Done
>>> E: Unable to locate package firefox
>>>
>>> I'm running a 64 bit server but the clients are set up to run as 32 bit.
>>>
>>> Any ideas why the server can't find the apps to install them? I'm stumped
>>>
>>
>> Here's my notes on the subject (proxy removed) - note the first part:
>>
>>
>> Add Software and Applications
>>
>> Copy apt sources to chroot
>>
>> sudo cp /etc/apt/sources.list /opt/ltsp/i386/etc/apt/sources.list
>>
>> sudo apt-get update
>>
>> Install software to server
>>
>> sudo apt-get update
>>
>> apt-get install gnome-session-fallback ubuntu-restricted-extras hydrogen
>> mypaint audacity vlc tuxmath tuxpaint cups-pdf scratch epoptes
>>
>> Update, upgrade and install software into the chroot
>>
>> sudo ltsp-chroot -m -r <http://wf1.thegrid.org.uk:80>
>>
>> apt-get update
>>
>> apt-get upgrade
>>
>> apt-get install gnome-session-fallback ubuntu-restricted-extras firefox
>> hydrogen mypaint audacity vlc tuxmath epoptes-client tuxpaint scratch
>>
>> Get epoptes certificate from the server (from the chroot)
>>
>> epoptes-client -c
>>
>> Reimage and restart services
>>
>> sudo ltsp-update-image; sudo ltsp-update-sshkeys; sudo service nbd-server
>> restart; sudo service tftpd-hpa restart; sudo service isc-dhcp-server
>> restart
>>
>> Hope 

[Ltsp-discuss] I just set Chromium to start immediately after a client logs in. On my own chromium I know how to set the default page to open any page I tell it but is there some way I can tell it to

[Robert Lefebvre]

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Re: [Ltsp-discuss] I just set Chromium to start immediately after a client logs in. On my own chromium I know how to set the default page to open any page I tell it but is there some way I can tell it

[Robert Lefebvre]

Thank you both for your help.

I was able to get Matt's solution to work by adding the desired starting
page to the bash file like this
#!/bin/bash
/usr/bin/chromium-browser localhost

Jim, I wasn't able to get yours to work. Does the file need an extension?
And the folders you specified in the path didn't exist so I created them.
And I just now realized that was for Google Chrome and we are using
Chromium.

Everything is working and I now have a bunch of resource pages for the
teachers and students.

THANKS!!



On Mon, Sep 2, 2013 at 6:52 PM, James McQuillan  wrote:

> Robert,
>
> I played with this stuff several months ago, and I found that you can put
> stuff in the master_preferences file.
>
> In my case,  I created a file called:
>  /opt/google/chrome/master_preferences
> and put this:
>
> {
>  "HomepageLocation" : "http://www.ltsp.org";,
>  "homepage_is_newtabpage" : false,
>  "browser" : {
>"show_home_button" : true
>  },
>  "bookmark_bar" : {
>"show_on_all_tabs" : true
>  },
>  "distribution" : {
>"skip_first_run_ui" : true,
>"show_welcome_page" : false,
>"import_search_engine" : false,
>"import_history" : false,
>"create_all_shortcuts" : true,
>"do_not_launch_chrome" : true,
>"make_chrome_default" : true
>  },
>  "sync_promo" : {
>"show_on_first_run_allowed" : false
>  }
> }
>
>
> The HomepageLocation is how I set everybody to load the same page when
> they launch Chrome.
>
> Also, I didn't want them needing to log in to chrome, so some of the other
> entries handled that.
>
> If you just search for 'chrome master_preferences', you'll find all kinds
> of great information.
>
> I like Matt's suggestion about naming the URL on the command line. You can
> embed that into the menu item or shortcut they use for launching the
> browser.
>
> Hope that helps,
> Jim McQuillan
> j...@ltsp.org
>
>
>
> On Mon, Sep 2, 2013 at 5:04 PM, Matt Johnson  wrote:
>
>>
>> On 2 September 2013 01:05, Robert Lefebvre 
>> wrote:
>>
>>>
>>> I just set Chromium to start immediately after a client logs in. On my
>>> own chromium I know how to set the default page to open any page I tell it
>>> but is there some way I can tell it to open every client to the same page?
>>> I want them to get a school news or announcement page when they login. An
>>> html page in localhost is what I have in mind if I can get them to see it
>>>
>> How far have you got, Robert?
>>
>> * Do all users now auto-start chromium on login? (LXDE?) Have you got
>> that working?
>>
>> Are you now just trying to point them to the right page?
>>
>> If so, the command:
>>
>> chromium-browser www.yahoo.com
>>
>> opens chromium at that page.
>>
>> --
>> Matt
>>
>>
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>>
>>
>
>
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> tutorial videos with LearnDevNow. Subscribe today and save!
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> _
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>   https://lists.sourceforge.net/lists/listinfo/ltsp-discuss
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>
>


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[Ltsp-discuss] Remote Desktop For LTSP

[Robert Lefebvre]

We've had pretty good success using the X2Go program to enable remote
access to both our server and our clients but I have just found Guacamole (
http://guac-dev.org/) which looks interesting.

I like it because it doesn't require that a client be installed on the
remote user's machine.

But, on the other hand, I don't like that it uses VNC which I think is
slower than the X protocol that X2Go uses (but I could be wrong).

Having just started looking at Guacamole, it sounds like it can use any
remote server so it might be possible to get the best of both worlds and
have Guacamole access the x2go remote x server.

Guacamole sounded like a good topic for discussion too.



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[Ltsp-discuss] Clustering or app servers?

[Robert Lefebvre]

We are currently running just one Edubuntu 12.04 server with a 6 core AMD
processor and 32 GB of ram but I would like to add 1 or more other servers.

I've looked at the ltspcluster.org site and for other tutorials but they
all sort of start "from scratch".

What I was wondering was if I can add the LTSP cluster suite (such as the
load balancer, ltsp-cluster-agent,ltsp-cluster-control etc) to my current
installation.

And along with that I am wondering whether two independent servers each
with edubuntu 12.04 installed can be clustered to work together?


Thanks

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Re: [Ltsp-discuss] Clustering or app servers?

[Robert Lefebvre]

Hi,

I'm not following the advantage of doing this with VMs. I've only dabbled
with them but I'm thinking to add additional processing power to the
network. If possible, I would like to scatter the servers throughout the
school and have them double as workstations for the teachers too. I know
the term "server" is loosely used in LTSP and isn't any special type of
computer. In our network the teachers get the best, strongest machines.
Often they are idle though as they are busy with students.

Am I correct in believing that once the load balancer assigns a request to
a particular server then that traffic would flow back and forth direct from
the client through the switch to the server?

> Do you mean clustering beyond the load balancing LTSP would provide?

Did I answer this above? Or is there some type of load balancing going on
in my single server system now? Like I said, I am thinking of using teacher
work stations as servers at the same time. Or is the idea totally whacked?




On Wed, Sep 4, 2013 at 2:10 PM, Robert Mavrinac wrote:

>  You should be able to install the ltsp packages easily. I put the
> ltsp-root, ltsp-loadbalancer and ltsp-cluster-control on one VM and run a
> number of application server VMs. Just make sure your application servers
> have the same configuration/packages once you start load balancing between
> them. You can pretty much follow the instructions for which packages to
> install on which server and just follow the instructions. Since you haven't
> already installed ltsp cluster packages, you are pretty much working from
> scratch, even with your existing server.
>
> Do you mean clustering beyond the load balancing LTSP would provide?
> Clustering may require a lot of other work, including fencing and share
> disks to support fail-over scenarios and certainly doesn't make sense in an
> LTSP cluster.
>
> Beyond load balancing
>
> On 04/09/13 01:37 PM, Robert Lefebvre wrote:
>
>   We are currently running just one Edubuntu 12.04 server with a 6 core
> AMD processor and 32 GB of ram but I would like to add 1 or more other
> servers.
>
>  I've looked at the ltspcluster.org site and for other tutorials but they
> all sort of start "from scratch".
>
>  What I was wondering was if I can add the LTSP cluster suite (such as the
> load balancer, ltsp-cluster-agent,ltsp-cluster-control etc) to my current
> installation.
>
>  And along with that I am wondering whether two independent servers each
> with edubuntu 12.04 installed can be clustered to work together?
>
>
>  Thanks
>
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>
>
>
>
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Re: [Ltsp-discuss] Remote Desktop For LTSP

[Robert Lefebvre]

Since X2Go works over SSH maybe someone can figure out how to get Guacamole
to work with it then as it says here
http://guac-dev.org/doc/gug/configuring-guacamole.html#idp689280

Adding an SSH connection

If you are using the default authentication built into Guacamole, and you
wish to grant access to a SSH connection to a particular user, you need to
locate the  section for that user within your user-mapping.xml,
and add a section like the following within it:


ssh
*localhost*
*22*


If added exactly as above, a new connection named "*Unique Name*" will be
available to the user associated with the  section containing
it. The connection will use SSH to connect to *localhost* at port *22*.
Naturally, you will want to change some or all of these values.

If you want to login automatically rather than receive a login prompt upon
connecting, you can specify a username and password with additional
tags. Other options are available for controlling the font.





On Wed, Sep 4, 2013 at 8:58 PM, Michael Pope  wrote:

>
>
> On Thu 05 Sep 2013 10:35:19 EST, John Hupp wrote:
> > On 9/4/2013 7:16 PM, Michael Pope wrote:
> >> Robert,
> >>
> >>
> >> On Thu 05 Sep 2013 01:21:54 EST, Robert Lefebvre wrote:
> >>> We've had pretty good success using the X2Go program to enable remote
> >>> access to both our server and our clients but I have just found
> >>> Guacamole (http://guac-dev.org/) which looks interesting.
> >>>
> >>> I like it because it doesn't require that a client be installed on the
> >>> remote user's machine.
> >>>
> >>> But, on the other hand, I don't like that it uses VNC which I think is
> >>> slower than the X protocol that X2Go uses (but I could be wrong).
> >>>
> >>> Having just started looking at Guacamole, it sounds like it can use
> >>> any remote server so it might be possible to get the best of both
> >>> worlds and have Guacamole access the x2go remote x server.
> >>>
> >>> Guacamole sounded like a good topic for discussion too.
> >>>
> >> Sounds reallly interesting. I've just switched from using VNC to using
> >> X2Go and the speed difference is huge. Using VNC was painfully slow
> >> even with full compression on, however using X2Go over the XDMCP
> >> protocol it's very fast, almost native speed over a 0.70mbit/sec upload
> >> link.
> >>
> >> I would be interested to see if Guacamole performs the same?
> >>
> >> from
> >> Mick
> >
> > I've been using Vino (VNC server) on the LTSP server with
> > https://meshcentral.com/.
> >
> > I'm using it because it's free for both business and personal use, it's
> > supported by Intel, client access is simple via a web browser, and it
> > also knows how to traverse the router's firewall without setting up
> > something like port forwarding.
> >
> > But it is currently only Alpha software (though it seems stable and
> > decently reliable), and I also find it to be slow.  It's also not in my
> > distro's (Ubuntu) repositories.
> >
> > Can anyone say whether X2Go or Guacamole handle firewall traversal so
> > easily?
> >
>
> X2Go works over SSH so as long as you have a port open for ssh
> (recommend something other than 22, eg: ) then you can use that one
> port for everything, also you could install fail2ban to stop brute
> force attacks on this port.
>
> from
> Mick
>
>
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Re: [Ltsp-discuss] Remote Desktop For LTSP

[Robert Lefebvre]

-> Joseph -This may be a simple question, but is this different from using
NX to
remotely access the LTSP server?  I've been using that for several
years and it has performed very well.

>From the x2go Developer's section - "X2Go server currently uses NXv3 based
libraries and tools for the backend implementation of X2Go (graphical
compression & caching for low bandwidth connections). "


Before I found x2go I used http://www.nomachine.com/ which uses NX but, if
I remember right, there was a limit on the free licenses one could get.
X2Go has not limits.

As an extra endorsement about X2Go performance, we had picked up a small
laptop at, of all places, a pawn shop and for some reason couldn't get it
to connect to our network so we gave it to one of our students. It was
horrifically slow running XP but the first thing we did was install X2Go.
Today, while accessing our server through wireless and the web with X2Go
this little laptop performed like a champ. Programs like Gimp, Libre Office
Writer popped right up on the screen.




On Thu, Sep 5, 2013 at 4:01 PM, Joseph Bishay wrote:

> Hello,
>
> This may be a simple question, but is this different from using NX to
> remotely access the LTSP server?  I've been using that for several
> years and it has performed very well.
>
> Thank you
> Joseph
>
> On Wed, Sep 4, 2013 at 11:21 AM, Robert Lefebvre
>  wrote:
> > We've had pretty good success using the X2Go program to enable remote
> access
> > to both our server and our clients but I have just found Guacamole
> > (http://guac-dev.org/) which looks interesting.
> >
> > I like it because it doesn't require that a client be installed on the
> > remote user's machine.
> >
> > But, on the other hand, I don't like that it uses VNC which I think is
> > slower than the X protocol that X2Go uses (but I could be wrong).
> >
> > Having just started looking at Guacamole, it sounds like it can use any
> > remote server so it might be possible to get the best of both worlds and
> > have Guacamole access the x2go remote x server.
> >
> > Guacamole sounded like a good topic for discussion too.
> >
> >
> >
> > --
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> >
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> >   https://lists.sourceforge.net/lists/listinfo/ltsp-discuss
> > For additional LTSP help,   try #ltsp channel on irc.freenode.net
> >
>
>
> --
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Re: [Ltsp-discuss] Remote Desktop For LTSP

[Robert Lefebvre]

Just got this reply to a question I posted on the FreeNode/#guacamole-help
channel

The question to guacamole-help : Does anyone know how/if guacamole
integrates with X2go?


Answered by:
 me_robert_too - x2go support is not implemented, but there is
no reason it couldn't be done
 a library like libguac-client-x2go would have to be written
to provide the support for guacd.

That's all way beyond my comprehension. People on that chat were all asking
what x2go was and was it faster than rdp.

I posted this because I thought it was something new and it does seem
that's the case.

There is another aspect of this X2Go saga in that it appears it can compete
with LTSP in the thin client area as well.


On Thu, Sep 5, 2013 at 4:46 PM, Robert Lefebvre  wrote:

> -> Joseph -This may be a simple question, but is this different from using
> NX to
>
> remotely access the LTSP server?  I've been using that for several
> years and it has performed very well.
>
> From the x2go Developer's section - "X2Go server currently uses NXv3 based
> libraries and tools for the backend implementation of X2Go (graphical
> compression & caching for low bandwidth connections). "
>
>
> Before I found x2go I used http://www.nomachine.com/ which uses NX but,
> if I remember right, there was a limit on the free licenses one could get.
> X2Go has not limits.
>
> As an extra endorsement about X2Go performance, we had picked up a small
> laptop at, of all places, a pawn shop and for some reason couldn't get it
> to connect to our network so we gave it to one of our students. It was
> horrifically slow running XP but the first thing we did was install X2Go.
> Today, while accessing our server through wireless and the web with X2Go
> this little laptop performed like a champ. Programs like Gimp, Libre Office
> Writer popped right up on the screen.
>
>
>
>
> On Thu, Sep 5, 2013 at 4:01 PM, Joseph Bishay wrote:
>
>> Hello,
>>
>> This may be a simple question, but is this different from using NX to
>> remotely access the LTSP server?  I've been using that for several
>> years and it has performed very well.
>>
>> Thank you
>> Joseph
>>
>> On Wed, Sep 4, 2013 at 11:21 AM, Robert Lefebvre
>>  wrote:
>> > We've had pretty good success using the X2Go program to enable remote
>> access
>> > to both our server and our clients but I have just found Guacamole
>> > (http://guac-dev.org/) which looks interesting.
>> >
>> > I like it because it doesn't require that a client be installed on the
>> > remote user's machine.
>> >
>> > But, on the other hand, I don't like that it uses VNC which I think is
>> > slower than the X protocol that X2Go uses (but I could be wrong).
>> >
>> > Having just started looking at Guacamole, it sounds like it can use any
>> > remote server so it might be possible to get the best of both worlds and
>> > have Guacamole access the x2go remote x server.
>> >
>> > Guacamole sounded like a good topic for discussion too.
>> >
>> >
>> >
>> > --
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>> >   https://lists.sourceforge.net/lists/listinfo/ltsp-discuss
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>> >
>>
>>
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>> h

Re: [Ltsp-discuss] Clustering or app servers?

[Robert Lefebvre]

i have experimented with LDAP and had it working (I think) on what is now
our back up server. So do I absolutely have to use LDAP to cluster servers?

If so, I think I would opt to do a total new install on another box. With
your experience does that seem like the best approach?

Thanks


On Thu, Sep 5, 2013 at 9:54 AM, Robert Mavrinac wrote:

> On 04/09/13 06:51 PM, Robert Lefebvre wrote:
> > Hi,
> >
> > I'm not following the advantage of doing this with VMs. I've only
> > dabbled with them but I'm thinking to add additional processing power
> > to the network. If possible, I would like to scatter the servers
> > throughout the school and have them double as workstations for the
> > teachers too. I know the term "server" is loosely used in LTSP and
> > isn't any special type of computer. In our network the teachers get
> > the best, strongest machines. Often they are idle though as they are
> > busy with students.
> >
> I wasn't suggesting you should use VMs.
> > Am I correct in believing that once the load balancer assigns a
> > request to a particular server then that traffic would flow back and
> > forth direct from the client through the switch to the server?
> >
> That's how it works. You need one root server for the thin clients to
> boot from. As I said, this should also be your cluster control and load
> balancer. The teacher's computer's can act as application servers, but
> they need to be configured similarly, preferably identically, so the
> thin client user experiences the same environment everywhere.
>
> Also, I am assuming you have centralized authentication like LDAP and
> shared network home directories.
> > > Do you mean clustering beyond the load balancing LTSP would provide?
> >
> > Did I answer this above? Or is there some type of load balancing going
> > on in my single server system now? Like I said, I am thinking of using
> > teacher work stations as servers at the same time. Or is the idea
> > totally whacked?
>
>
>
> --
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Re: [Ltsp-discuss] Remote Desktop For LTSP

[Robert Lefebvre]

Something else to maybe consider is x2go use with ltsp clustering. I've
been studying clustering servers and am about to go that route and cluster
servers seem to conduct dual load balancing - one for nx traffic and the
other for, lets say local? *I may be wrong but it sounds like that's what
goes on.

*
*After installing x2go server in Ubuntu 12.04 there is a user named x2go
user. Hope that helps with the "on demand" question.


*


On Fri, Sep 6, 2013 at 10:22 AM, John Hupp  wrote:

> Quite true that with MeshCentral you have to install their agent (though
> free, I suppose it is proprietary, didn't check) and routes all traffic
> across MC servers.  But the other way to see part of that is that you
> don't have to run your own server, thus lightening the load on the
> machine you want to access.
>
> And yes, I understand that x2go, nx and vnc would require firewall
> configuration, which for me is a big disadvantage (though I sure like
> what I hear about the speed that x2go and nx offer).  But if I read
> correctly, Guacamole's design based on http has no problem with
> firewalls.  That's attractive.
>
> Perhaps the next question for me then becomes how much load do Tomcat
> and Guacamole impose on the server, and can I run them on-demand?
>
> On 9/6/2013 1:06 AM, Christian Lensch wrote:
> > Hi John,
> >
> > none of the solutions (x2go, nx, vnc) will do without portforwarding/nat
> > on your firewall. Only meshcentral does that. But MC forces you to
> > install a proprietary agent and routes all traffic over its onwn servers.
> >
> > My 2 cents
> >
> > Christian
> >
> > Am 05.09.2013 22:18, schrieb John Hupp:
> >> On 9/5/2013 4:01 PM, Joseph Bishay wrote:
> >>> Hello,
> >>>
> >>> This may be a simple question, but is this different from using NX to
> >>> remotely access the LTSP server?  I've been using that for several
> >>> years and it has performed very well.
> >>>
> >>> Thank you
> >>> Joseph
> >>>
> >>> On Wed, Sep 4, 2013 at 11:21 AM, Robert Lefebvre
> >>>  wrote:
> >>>> We've had pretty good success using the X2Go program to enable remote
> access
> >>>> to both our server and our clients but I have just found Guacamole
> >>>> (http://guac-dev.org/) which looks interesting.
> >>>>
> >>>> I like it because it doesn't require that a client be installed on the
> >>>> remote user's machine.
> >>>>
> >>>> But, on the other hand, I don't like that it uses VNC which I think is
> >>>> slower than the X protocol that X2Go uses (but I could be wrong).
> >>>>
> >>>> Having just started looking at Guacamole, it sounds like it can use
> any
> >>>> remote server so it might be possible to get the best of both worlds
> and
> >>>> have Guacamole access the x2go remote x server.
> >>>>
> >>>> Guacamole sounded like a good topic for discussion too.
> >>>>
> >>>>
> >> Joseph, as far as I know it is a similar solution with its own strengths
> >> and weaknesses.  I think it defaults to running over SSH, which would
> >> mean that the firewall would have to be configured to allow for remote
> >> access to the SSH server.  For my purposes that is a disadvantage.  And
> >> it requires a client, rather than simply using a web browser on the
> >> client machine like Guacamole does.
> >>
>
>
>
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Re: [Ltsp-discuss] Clustering or app servers?

[Robert Lefebvre]

Thanks Robert,

Each teacher and each student have their own accounts and home directories
so they all log on anywhere in the school. The teacher "servers" (i.e.
machines) will be located by the teachers work desks mainly so they can
keep a close eye on them.

I'm using webmin as an administrative GUI but can and do sometimes do
things from the CL.

The current install is EdUbuntu 12.04 w/o LDAP.

The reason I was thinking of making a new install is safety because the
current machine is the production unit. If I could get the main
authentication and home directory server set up, add two more
teacher/server cluster units then  I can move the authentication passwords,
user accounts, home directories and the network to the new cluster control
server. After that is set up I would definitely want the current production
unit to be added to the cluster but probably only as an app server right? I
mean, it is the strongest machine we have and could handle most of the apps
by itself whereas the authentication/ cluster control server has a lighter
load and doesn't need to be as powerful correct?


On Fri, Sep 6, 2013 at 10:12 AM, Robert Mavrinac wrote:

> On 06/09/13 09:22 AM, Robert Lefebvre wrote:
> > i have experimented with LDAP and had it working (I think) on what is
> > now our back up server. So do I absolutely have to use LDAP to cluster
> > servers?
> No, you don't have to use LDAP to cluster the servers, but you should
> manage accounts from one source rather than trying to synchronize
> multiple password files. You could use NIS or Kerberos, but I wouldn't.
> The application servers all need to authenticate the same collection of
> users.
> >
> > If so, I think I would opt to do a total new install on another box.
> > With your experience does that seem like the best approach?
> >
> I think it might be better if you send me a more complete description of
> what you want the final setup to look like. As I understand it, you need
> a root server for clients to boot from, which is also a cluster
> controller and load balancer. You want multiple teacher desktop's to
> become the application servers. I'm sure you would probably be
> interested in setting up the classroom management software (epoptes) as
> well.
>
> Some important questions to be answered are:
>
> 1. Do the teachers all have unique accounts?
>
> 2. If so, do you have network storage for their home directories? The
> reason I'm asking this is that LTSP will provide you with distributed
> resources - each teacher could log in to any LTSP client or their own
> desktop (an application server) and get the exact same environment.
>
> 3. Do the students have their own accounts, or are they using computers
> as guests or kiosks?
>
>
>
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[Ltsp-discuss] ltsp cluster installation

[Robert Lefebvre]

I am following the instructions here -
https://help.ubuntu.com/community/UbuntuLTSP/LTSP-Cluster trying to build
the cluster server in a desktop with Edubuntu 12.04 installed.
During the install I got one warning that may have something to do with the
problem.
Install gave this error

┤ Configuring libphp-adodb ├┐
│ WARNING: include path for php has changed!
│ libphp-adodb is no longer installed in /usr/share/adodb.
New  installation path is now /usr/share/php/adodb.
Please update your php.ini file. Maybe you must also change your
web-server configuraton.

I wasn't able to locate any current path setting to /usr/share/adodb nor
anything there about libphp-adodb so I am totally clueless what, if
anything , I am supposed to put in the php.ini file.

But I continued on with the installation. Everything else went well until
it got to where I was to use the browser to open a config page. I've tried
a number of different paths but can never get to open the

http://ltsp-root01/ltsp-cluster-control/Admin/admin.php from the browser.

In the ltsp-cluster-control.config.php file it has this as the path to
the admin page but that doesn't
work in the browser as a replacement for what the instructions say-

 $CONFIG['rootInstall'] = "/usr/share/ltsp-cluster-control/Admin/";

http://usr/share/ltsp-cluster-control/Admin/admin.php from the browser
gets a file not found error while
/usr/share/ltsp-cluster-control/Admin/admin.php won't open because it
is php and needs apache. Thanks


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[Ltsp-discuss] This defies computer science?

[Robert Lefebvre]

I have a new installation of Edubuntu 12.04 on a 6 core amd with 16 gb of
ram.

Everything is working fine when logged into the server and at one client
station but none of the other clients will let anyone in. The users on the
"bad" clients do get authenticated but after authentication the screen is
returned to the initial login window requesting the username again.

Here is the really strange part ...

On the client that does connect correctly, any/all users registered in the
server can get in at it.

If I unplug the ethernet cable from it and plug it into another pc then no
one will be able to log in. I find that out as it is the same cable, same
switch, same server settings, same authentication that worked previously on
the one working client.
The only difference I can see is different mac addresses of the PC.

I worked back through with troubleshooting including swapping cables,
swapping swithes, restarting the server, and the clients etc and have
reproduced the symptoms multiple times, multiple pcs. I even considered
that the room had been hit by lightning and all the pcs but one were killed
so I tried my own laptop on the network and got the same results.

The server must have somehow gotten set to only accept a couple of mac
addresses and is canceling the login of any others even if the user is
authenticated.

Your help resolving this is sorely needed and greatly appreciated.

Robert Lefebure

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[Ltsp-discuss] lost gui on server

[Robert Lefebvre]

I made a new install of edubuntu 12.04 with ltsp last night and left it on.
This morning it was telling me it needed to restart in order to finish
updates and when I did, it gave a window about running in reduced or
limited (I forget the exact term). After clicking to continue the screen
goes black with some text but is not a command line.

How do I get my gui back?

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Re: [Ltsp-discuss] lost gui on server

[Robert Lefebvre]

It turned out to be caused by me turning off the video card driver update
before it was completed. I was able to login as admin from one of the
clients, went to Stem Settings and selected Hardware Additional Drivers.
And this time I waited :-)




On Tue, Oct 1, 2013 at 12:15 PM, ABIX Adam Jurkiewicz <
a.jurkiew...@abix.info.pl> wrote:

> Dnia 2013-10-01, wto o godzinie 11:53 -0400, Robert Lefebvre pisze:
> > I made a new install of edubuntu 12.04 with ltsp last night and left
> > it on. This morning it was telling me it needed to restart in order to
> > finish updates and when I did, it gave a window about running in
> > reduced or limited (I forget the exact term). After clicking to
> > continue the screen goes black with some text but is not a command
> > line.
> Can you start server from some LiveCD and get some logs
> (/var/log/syslog) and put it to pastebin?
>
> Without logs is like finding mouse in desert...
> --
> Bo życie jest weselsze, milej płynie czas, gdy świeży podmuch wiatru w
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>
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Re: [Ltsp-discuss] Load Balancing in LTSP-cluster

[Robert Lefebvre]

I was running EdUbuntu in a school environment and tried to implement
clustering and never was able to get it working. Thehttps://
www.ltsp-cluster.org/ is so old it belongs in the wayback archives. I had
come to the conclusion that the Ubuntu community is more concerned with the
bells and whistles of the desktop than with clustering and that is fine.
But trying to use old, none supported documentation turned into one huge
time sink. I finally concluded that if I ever were to get clustering going
I would need to switch to Debian. Just my opinion but it seems that
community is much more devoted to maintaining clustering capabilities than
the Ubuntu communty by a long shot. Don't waste your time with Ubuntu. They
obviously don't care about clustering so their Edubuntu package is
basically limited to what one server can handle.


On Sun, Aug 24, 2014 at 2:25 AM, arshpreet singh  wrote:

> On Sun, Aug 24, 2014 at 3:30 AM,  wrote:
>
> > I did have load balancing in our school. Two identical monster server
> > and dhcp failover.
>
> 
>
> > Here is old howto I did use.
> >
> > https://wiki.edubuntu.org/EdubuntuDHCPload-balancingFailover
>
> We tried it some days ago but could not get the required output. At
> that time we were not much familiar with the things but now we are
> quite familiar as well as Damn Interested. :)
>
> > I have my old setup here, maybe you can have some ideas:
> >
> > Please, use Google Translate - http://tinyurl.com/lj36kne
> > http://wiki.ubuntu-fi.org/LTSP5_M%C3%A4ntykankaan_koulu
>
> This seems great help. Thanks!
>
> > Here is setup for master server:
> >
> > http://www.arkki.info/howto/Wiki/LTSP5-Mantykangas/ltsp-master/
>
> 
>
> > Here is setup for slave server:
> >
> > http://www.arkki.info/howto/Wiki/LTSP5-Mantykangas/ltsp-slave/
>
> 
>
> > I have to say that maybe you should use Debian based system with those
> > old HP t5xxx. Not Ubuntu. Go to IRC and ask 'vagrantc', he knows all
> > about LTSP and Debian.
>
> We will work on both as a parallel team. You are suggesting Debian
> because of stability issue or something else?
>
> How you define the master and slave server?
> Like:
>
> Master server = Root Server
> Slave Server=Application Server
>
> We have four Servers so What should be our model One master Three
> slaves or Two master two slaves?
>
> --
>
> Thanks
> Arshpreet singh
> http://arshpreetsingh.wordpress.com/
>
> ਮੇਰੀਆਂ ਆਸਾਂ ਉਮੀਦਾਂ ਦੇ, ਹਰਦਮ ਬੂਟੇ ਹਰੇ Rehnde
>
>
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