[ilugd] 'Active - Active MYSQL

2010-07-24 Thread Anand Kapoor
Hello,

Could somebody point me to the best place to get started if both nodes of a
MYSQL cluster need to be active. Also how best to achieve this if the
instances are segregated over the WAN ?

Thank you,
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Re: [ilugd] [X-Post] Guest account in Ubuntu 10.04

2010-07-24 Thread Ashish SHUKLA
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Hash: SHA512

Kartik Singhal writes:
> On Sat, Jul 24, 2010 at 10:14 PM, Ashish SHUKLA wrote:

>> [Your CCing the same mail to various lists in the name of X-Post sucks. It
>> is
>> rude when other lists permits only subscribers to post. So, for a little
>> convenience of yours, you're pissing off those who are trying to help
>> you. Please avoid this, this is not USENET.]
>> 

> Yeah, seems like I messed up :( . Your mail was not received by fsug-tvm.
> Have never used USENET though. Won't repeat my mistake.

Yes, that's because I'm not subscribed to that list and I received a failure 
notice.

> You mean we have NFS for anonymous mount, SFTP for authentication and Samba
> for windows clients (if I got that right)?

Yes, NFS mount with 'all_squash' option to squash all users to the anonymous
UID/GID.

>>> And instead of having this script, why not initialize the ~guest with a
>> >> .desktop file which points to location like: sftp://192.168.5.82/
>> 
>> > It is indeed a .desktop file while just runs this script. This is for
>> > accessing the private shares of a particular user which is not same as
>> the
>> > 'user' account they use to login to the client.
>> 
>> The reason I suggested is because entering a username/password in a dialog
>> box
>> looks straightforward to me, and SFTP url will be the same. You can
>> configure
>> OpenSSH in chroot mode[1] preventing users from exploring the server
>> file-system.
>> 

> I think I missed the point earlier as we had not deployed SFTP ever.

SFTP = file transfer protocol (not FTP) over SSH. You can create SFTP-only
users restricted to their chroot.

>> And also if '/$un/' share requires authentication, you're entering same
>> username twice, one at your script and other in the user/password dialog
>> box
>> which nautilus pops up. SFTP offers secure access and is well integrated
>> with
>> Nautilus and GNOME VFS.
>> 

> Yeah, this was annoying to enter the user name twice. Seems like this would
> be a far better solution.

> Thanks for all the help and your time. Will try this setup and inform here.

Cool. Looking forward to read your experience.

- -- 
Ashish SHUKLA

“But it was all right, everything was all right, the struggle was
finished. He had won the victory over himself. He loved Big Brother.”
(George Orwell, "Nineteen Eighty-Four", 1949)
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Re: [ilugd] [X-Post] Guest account in Ubuntu 10.04

2010-07-24 Thread Kartik Singhal
On Sat, Jul 24, 2010 at 10:14 PM, Ashish SHUKLA wrote:

> [Your CCing the same mail to various lists in the name of X-Post sucks. It
> is
> rude when other lists permits only subscribers to post. So, for a little
> convenience of yours, you're pissing off those who are trying to help
> you. Please avoid this, this is not USENET.]
>

Yeah, seems like I messed up :( . Your mail was not received by fsug-tvm.
Have never used USENET though. Won't repeat my mistake.

 >> Instead of putting up an SMB server, why not use an SFTP server and an
> NFS
> >> server ?
> >>
> >> NFS server for anonymous mounts. And SFTP for authenticated mounts.
> >>
>
> > We need to be able to access the server from windows clients too in the
> > other lab, hence we decided for samba. We ran into either problems or
> > complications while trying to deploy setups like nfs and ldap. And after
> a
> > lot of testing with this setup we have not observed any problems. Our
> only
> > problem seems to be with resetting the machines.
>
> Well, it is not forbidden to share $HOME through multiple protocols.
>

You mean we have NFS for anonymous mount, SFTP for authentication and Samba
for windows clients (if I got that right)?

 >> And instead of having this script, why not initialize the ~guest with a
> >> .desktop file which points to location like: sftp://192.168.5.82/
>
> > It is indeed a .desktop file while just runs this script. This is for
> > accessing the private shares of a particular user which is not same as
> the
> > 'user' account they use to login to the client.
>
> The reason I suggested is because entering a username/password in a dialog
> box
> looks straightforward to me, and SFTP url will be the same. You can
> configure
> OpenSSH in chroot mode[1] preventing users from exploring the server
> file-system.
>

I think I missed the point earlier as we had not deployed SFTP ever.


>  And also if '/$un/' share requires authentication, you're entering same
> username twice, one at your script and other in the user/password dialog
> box
> which nautilus pops up. SFTP offers secure access and is well integrated
> with
> Nautilus and GNOME VFS.
>

Yeah, this was annoying to enter the user name twice. Seems like this would
be a far better solution.

Thanks for all the help and your time. Will try this setup and inform here.

-- 
Kartik Singhal
Second Year BTech CSE Student, NIT Calicut
http://www.techglider.com
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Re: [ilugd] [X-Post] Guest account in Ubuntu 10.04

2010-07-24 Thread Ashish SHUKLA
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Hash: SHA512

[Your CCing the same mail to various lists in the name of X-Post sucks. It is
rude when other lists permits only subscribers to post. So, for a little
convenience of yours, you're pissing off those who are trying to help
you. Please avoid this, this is not USENET.]

Kartik Singhal writes:
> Thanks Ashish for your response.

> On Sat, Jul 24, 2010 at 9:30 PM, Ashish SHUKLA  wrote:

>> Instead of putting up an SMB server, why not use an SFTP server and an NFS
>> server ?
>> 
>> NFS server for anonymous mounts. And SFTP for authenticated mounts.
>> 

> We need to be able to access the server from windows clients too in the
> other lab, hence we decided for samba. We ran into either problems or
> complications while trying to deploy setups like nfs and ldap. And after a
> lot of testing with this setup we have not observed any problems. Our only
> problem seems to be with resetting the machines.

Well, it is not forbidden to share $HOME through multiple protocols.

>> > #!/bin/bash
>> >> echo 'Enter your username: '
>> >> read un
>> >> nautilus smb://192.168.5.82/$un/
>> >>
>> 
>> And instead of having this script, why not initialize the ~guest with a
>> .desktop file which points to location like: sftp://192.168.5.82/


> It is indeed a .desktop file while just runs this script. This is for
> accessing the private shares of a particular user which is not same as the
> 'user' account they use to login to the client.

The reason I suggested is because entering a username/password in a dialog box
looks straightforward to me, and SFTP url will be the same. You can configure
OpenSSH in chroot mode[1] preventing users from exploring the server 
file-system.

And also if '/$un/' share requires authentication, you're entering same
username twice, one at your script and other in the user/password dialog box
which nautilus pops up. SFTP offers secure access and is well integrated with
Nautilus and GNOME VFS.

References:
[1]  http://www.debian-administration.org/articles/590

HTH
- -- 
Ashish SHUKLA

“Well, I guess cyborgs like myself have a tendency to be paranoid
about our origins.” (Motoko Kusanagi in movie "Ghost in the Shell")
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Re: [ilugd] [X-Post] Guest account in Ubuntu 10.04

2010-07-24 Thread Kartik Singhal
Thanks Ashish for your response.

On Sat, Jul 24, 2010 at 9:30 PM, Ashish SHUKLA  wrote:

> Instead of putting up an SMB server, why not use an SFTP server and an NFS
> server ?
>
> NFS server for anonymous mounts. And SFTP for authenticated mounts.
>

We need to be able to access the server from windows clients too in the
other lab, hence we decided for samba. We ran into either problems or
complications while trying to deploy setups like nfs and ldap. And after a
lot of testing with this setup we have not observed any problems. Our only
problem seems to be with resetting the machines.


>  > #!/bin/bash
> >> echo 'Enter your username: '
> >> read un
> >> nautilus smb://192.168.5.82/$un/
> >>
>
> And instead of having this script, why not initialize the ~guest with a
> .desktop file which points to location like: sftp://192.168.5.82/


It is indeed a .desktop file while just runs this script. This is for
accessing the private shares of a particular user which is not same as the
'user' account they use to login to the client.

Clarification: "user" is the name of account which is common for all
machines and is used to login to them and they are supplied a private share
on the server if they need. Otherwise, very conveniently, they can just use
their pen drives for saving their private files without needing a user name
in the lab.


>  > What we need though is a method by which we can "reset" the 'user'
> account's
> > home directory at each log in, deleting any traces of the previous user's
> > activity and recreates these two icons. I had created the script to
> generate
> > the icons, it can just be integrated to the solution of this problem.
>
> What you need is a kiosk setup. There are lots of links about that on the
> Internet, including one by jwz[1]. Or a modern (and of course recommended)
> way, using pam_namespace[2]. Fedora used this in Fedora Kiosk spin[3],
> IIRC.
>
> References:
> [1]  http://www.dnalounge.com/backstage/src/kiosk/#auto-reset
> [2]
> http://www.kernel.org/pub/linux/libs/pam/Linux-PAM-html/sag-pam_namespace.html
> [3]  http://spins.fedoraproject.org/kiosk/


Thanks for the links. Trying to figure out if I find something for our need.


-- 
Kartik Singhal
BTech CSE Student, NIT Calicut
http://www.techglider.com
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Re: [ilugd] [X-Post] Guest account in Ubuntu 10.04

2010-07-24 Thread Ashish SHUKLA
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Hash: SHA512

Kartik Singhal writes:
> We are setting up a lab in our computer center for encouraging students to
> use linux. We are already done with setting up Ubuntu 10.04 32-bit on most
> of the systems. What we have planned is to give a common underprivileged
> 'user' account in all the systems with same password that we can tell the
> users. Users have the advantage of using their flash drives which they were
> not allowed to use on windows systems because of viruses.

> The problem of common storage is being taken into account by having a
> central storage server running samba. It is available in the form of two
> icons on the desktop:
> 1. Public-Share-on-Ubuntu-Server (which is publicly accessible by everyone
> and is permanently mounted on the client as a /etc/fstab entry)
> 2. Access-Private-Share-on-Ubuntu-Server (which is private to a particular
> user)

Instead of putting up an SMB server, why not use an SFTP server and an NFS
server ?

NFS server for anonymous mounts. And SFTP for authenticated mounts.

> The second icon is just a shortcut to the following script which allows
> users to access their private files after requesting (only on first usage)
> for a user name from one of the lab assistants:

> #!/bin/bash
>> echo 'Enter your username: '
>> read un
>> nautilus smb://192.168.5.82/$un/
>> 

And instead of having this script, why not initialize the ~guest with a
.desktop file which points to location like: sftp://192.168.5.82/

> What we need though is a method by which we can "reset" the 'user' account's
> home directory at each log in, deleting any traces of the previous user's
> activity and recreates these two icons. I had created the script to generate
> the icons, it can just be integrated to the solution of this problem.

What you need is a kiosk setup. There are lots of links about that on the
Internet, including one by jwz[1]. Or a modern (and of course recommended)
way, using pam_namespace[2]. Fedora used this in Fedora Kiosk spin[3], IIRC.

References:
[1]  http://www.dnalounge.com/backstage/src/kiosk/#auto-reset
[2]  
http://www.kernel.org/pub/linux/libs/pam/Linux-PAM-html/sag-pam_namespace.html
[3]  http://spins.fedoraproject.org/kiosk/

HTH
- -- 
Ashish SHUKLA  | GPG: F682 CDCC 39DC 0FEA E116  20B6 C746 CFA9 E74F A4B0
freebsd.org!ashish | http://people.freebsd.org/~ashish/

“Premature optimisation is the root of all evil in programming.”
(C. A. R. Hoare)
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[ilugd] [X-POST] Guest account in Ubuntu 10.04

2010-07-24 Thread Kartik Singhal
We are setting up a lab in our computer center for encouraging students to
use linux. We are already done with setting up Ubuntu 10.04 32-bit on most
of the systems. What we have planned is to give a common underprivileged
'user' account in all the systems with same password that we can tell the
users. Users have the advantage of using their flash drives which they were
not allowed to use on windows systems because of viruses.

The problem of common storage is being taken into account by having a
central storage server running samba. It is available in the form of two
icons on the desktop:
1. Public-Share-on-Ubuntu-Server (which is publicly accessible by everyone
and is permanently mounted on the client as a /etc/fstab entry)
2. Access-Private-Share-on-
Ubuntu-Server (which is private to a particular user)

The second icon is just a shortcut to the following script which allows
users to access their private files after requesting (only on first usage)
for a user name from one of the lab assistants:

#!/bin/bash
> echo 'Enter your username: '
> read un
> nautilus smb://192.168.5.82/$un/
>

What we need though is a method by which we can "reset" the 'user' account's
home directory at each log in, deleting any traces of the previous user's
activity and recreates these two icons. I had created the script to generate
the icons, it can just be integrated to the solution of this problem.

Though the Guest account that does this is available on ubuntu but it is
only accessible when some other user is logged in and can't be accessed from
the main login screen.

The following was taken from ubuntuforums (
http://ubuntuforums.org/showthread.php?t=1024371)

> Imagine the scenario:
>
> A library patron logs on to check his email, surf the web, then downloads a
> photo from his camera and puts it in a document that he then saves to a
> thumb drive. He logs off and leaves. We don't want the next patron that uses
> that machine to "see" any of the things previous users did, where they went
> or documents they worked on.
>
> I don't mind the idea of a user account that has a password, we could give
> that out when the patron signs in, heck we could even change it once in a
> while. However, lock down of the account and deletion of previous user
> activity is of most importance.
>

Our requirement is similar. After a lot of searching on the net I have not
been able to find a way to do this.

If you have done any similar lab scenario, please share the method on the
list. It would be a great help.


-- 
Kartik Singhal
BTech CSE Student, NIT Calicut
http://www.techglider.com
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Re: [ilugd] REAL FOSS

2010-07-24 Thread Raj Mathur (राज माथुर)
On Saturday 24 Jul 2010, Nishant Prakash Kashyap wrote:
> *Finally I've learned one thing, even Open Source is not for
> Community, it is test bed for Corporate houses, a place for them to
> get the developers work for free, finally put a logo and then earn
> name, fame or money(anone one or all). And if any of the community
> member ever tries to give his REAL open views, best is taken care to
> supress the views.*

I have no clue what you're referring to, but if you promote a 
proprietary software package in one breath and complain about an Open 
Source community in the next, it's difficult to understand what your 
objective is.

Regards,

-- Raju
-- 
Raj Mathurr...@kandalaya.org  http://kandalaya.org/
   GPG: 78D4 FC67 367F 40E2 0DD5  0FEF C968 D0EF CC68 D17F
PsyTrance & Chill: http://schizoid.in/   ||   It is the mind that moves

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[ilugd] [X-Post] Guest account in Ubuntu 10.04

2010-07-24 Thread Kartik Singhal
We are setting up a lab in our computer center for encouraging students to
use linux. We are already done with setting up Ubuntu 10.04 32-bit on most
of the systems. What we have planned is to give a common underprivileged
'user' account in all the systems with same password that we can tell the
users. Users have the advantage of using their flash drives which they were
not allowed to use on windows systems because of viruses.

The problem of common storage is being taken into account by having a
central storage server running samba. It is available in the form of two
icons on the desktop:
1. Public-Share-on-Ubuntu-Server (which is publicly accessible by everyone
and is permanently mounted on the client as a /etc/fstab entry)
2. Access-Private-Share-on-Ubuntu-Server (which is private to a particular
user)

The second icon is just a shortcut to the following script which allows
users to access their private files after requesting (only on first usage)
for a user name from one of the lab assistants:

#!/bin/bash
> echo 'Enter your username: '
> read un
> nautilus smb://192.168.5.82/$un/
>

What we need though is a method by which we can "reset" the 'user' account's
home directory at each log in, deleting any traces of the previous user's
activity and recreates these two icons. I had created the script to generate
the icons, it can just be integrated to the solution of this problem.

Though the Guest account that does this is available on ubuntu but it is
only accessible when some other user is logged in and can't be accessed from
the main login screen.

The following was taken from ubuntuforums (
http://ubuntuforums.org/showthread.php?t=1024371)

> Imagine the scenario:
>
> A library patron logs on to check his email, surf the web, then downloads a
> photo from his camera and puts it in a document that he then saves to a
> thumb drive. He logs off and leaves. We don't want the next patron that uses
> that machine to "see" any of the things previous users did, where they went
> or documents they worked on.
>
> I don't mind the idea of a user account that has a password, we could give
> that out when the patron signs in, heck we could even change it once in a
> while. However, lock down of the account and deletion of previous user
> activity is of most importance.
>

Our requirement is similar. After a lot of searching on the net I have not
been able to find a way to do this.

If you have done any similar lab scenario, please share the method on the
list. It would be a great help.


-- 
Kartik Singhal
BTech CSE Student, NIT Calicut
http://www.techglider.com
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[ilugd] REAL FOSS

2010-07-24 Thread Nishant Prakash Kashyap
*Finally I've learned one thing, even Open Source is not for Community, it
is test bed for Corporate houses, a place for them to get the developers
work for free, finally put a logo and then earn name, fame or money(anone
one or all). And if any of the community member ever tries to give his REAL
open views, best is taken care to supress the views.*


-- 
Regards,
Nishant Kashyap
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Re: [ilugd] MTS MBlaze woes

2010-07-24 Thread Gora Mohanty
On Thu, 22 Jul 2010 05:20:07 +0530
Andrew Lynn  wrote:
[...]
> I do not have the device you are using, but had similar problems
> with my MTNL 3G usb data card. Switching from storage device to
> modem can be done with the usb_modeswitch package. This is
> automated, and updating to 1.12 and above solved the problem for
> me.
[...]

Not using MTS, nor Ubuntu 10.04 (still on 9.04), but will echo
Andrew's recommendation of usb-modeswitch. This should exist as a
package for 10.04, but I had to manually build it for 9.04, using
downloads from here: http://www.draisberghof.de/usb_modeswitch/

Regards,
Gora

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Re: [ilugd] Initrd query

2010-07-24 Thread Anil Seth
On 24 July 2010 15:19, Mahesh Pai  wrote:
> Can an initrd image built for one hard ware boot other hard ware
> configuration? Specifically, my ups conked out taking regular machines
> down with it. Nothing much can be done. And i an lucky to get back the
> disk with data and os intact. That was an msi mobo with via chipset.
> Today evening I will get a new system with asus m2n 68 am   mobo and
> nvidia 7025 chipset. Will i be able boot on new mobo using old initrd
> image? If not what do i need to do? The old initrd image is built
> using the option to use only required modules. Which meant several
> modules were left out and i got a very small initrd image and faster
> system. Apologies for poor formatting. Posting from mobile. Dunno how
> to enter line break.
>
> ___

The initrd on installation media is quite generic. You can use that.

If you can boot into the system from an alternate medium, chroot and
you can use mkinitrd to create a fresh one.

Regards
Anil

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[ilugd] Initrd query

2010-07-24 Thread Mahesh Pai
Can an initrd image built for one hard ware boot other hard ware
configuration? Specifically, my ups conked out taking regular machines
down with it. Nothing much can be done. And i an lucky to get back the
disk with data and os intact. That was an msi mobo with via chipset.
Today evening I will get a new system with asus m2n 68 am   mobo and
nvidia 7025 chipset. Will i be able boot on new mobo using old initrd
image? If not what do i need to do? The old initrd image is built
using the option to use only required modules. Which meant several
modules were left out and i got a very small initrd image and faster
system. Apologies for poor formatting. Posting from mobile. Dunno how
to enter line break.

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