Re: [Ltsp-discuss] Grant write privileges to PHP to the etc/passwd
Hi Robert,
With OpenLDAP you have a server and a client. Server is the user
database, client can query the database and authenticate against it.
These links should definitely explain everything you want to know about
setting up the client:
https://help.ubuntu.com/community/LDAPClientAuthentication
http://askubuntu.com/questions/127389/how-to-configure-ubuntu-as-an-ldap-client
Little tip on the side: if you configure LDAP wrong and it times out
while authenticating against a server (which shouldn't happen on
localhost, but alas), your system can hang for a minute or two at boot.
Beginners mistake I made a while back. Panicking is not required, as
your system will continue to boot after a while.
Good luck. :-)
Kindest regards,
Jan Middelkoop
Recreatie en Zorg Groep B.V.
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Op 13-11-12 16:38, Robert Lefebvre schreef:
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
mailto:robert.r.lefeb...@gmail.com>> wrote:
Thanks Jan. Will definitely do that.
On Mon, Nov 12, 2012 at 8:40 AM, Jan Middelkoop
mailto:j...@recreatie-zorg.nl>> 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.
--
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E-mail: j...@recreatie-zorg.nl <mailto: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
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 _ 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
Re: [Ltsp-discuss] Grant write privileges to PHP to the etc/passwd
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. -- Website: http://www.recreatie-zorg.nl/ E-mail: j...@recreatie-zorg.nl Telephone: +31 10 714 22 97 -- 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 _ 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
Re: [Ltsp-discuss] Grant write privileges to PHP to the etc/passwd
On a side note, if you absolutely -must- torture yourself by doing this with PHP, at least add the user running your PHP script (apache?) to /etc/sudoers. You can give it access to run the proper useradd commands as root, which is a lot better than having it write to /etc/passwd. 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 09-11-12 16:11, Robert Lefebvre schreef: Hi, I want to be able to give "write to the etc/passwd file" privileges to the teachers so that they can suspend and restore their student's user privileges. I am fairly proficient with PHP so I began the project by building a script that manages all of this but I ran into a snag when I tried to have PHP save the file back because of the permissions associated with the passwd file. As sudo, I can manually open etc/passwd with gedit and I deactive a user simply by changing their group from being 100 to empty (they then can't login). To reinstate them I change their group back to 100. Most of the suspensions are for disciplinary reasons and are not very long. In the PHP script I read the file (only display student users), make changes with a form , save the specs in a MySql suspension log along with a restoration date and time. Now I want to overwrite the current file with the edited one. I also hope to have a cron write to the file also to automatically restore the privileges. As a brief experiment I expanded the permissions to the file and was able to write to it with PHP but if I do, after all, decide to do this I want to make as small of a security hole for php as possible so I am asking for security related ideas for enabling php to write to the passwd file. I've Googled, of course, and see some possibiliteies with htaccess. It seems like I could grant write privileges to php but wondered if I could get even more restrictive with htaccess so that only the actual php file could write? And any other ideas would be welcomed too, even including "What! Don't do it!". Thanks 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 -- 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 _ 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 -- 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_ 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
Re: [Ltsp-discuss] Grant write privileges to PHP to the etc/passwd
For the love of god, please use 389 Directory Server or OpenLDAP! Speaking from experience with 389 DS, it'll not only give you the user interface you're looking for out of the box, but it'll also be a heck of a lot more secure and robust than your PHP solution. 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 09-11-12 16:11, Robert Lefebvre schreef: Hi, I want to be able to give "write to the etc/passwd file" privileges to the teachers so that they can suspend and restore their student's user privileges. I am fairly proficient with PHP so I began the project by building a script that manages all of this but I ran into a snag when I tried to have PHP save the file back because of the permissions associated with the passwd file. As sudo, I can manually open etc/passwd with gedit and I deactive a user simply by changing their group from being 100 to empty (they then can't login). To reinstate them I change their group back to 100. Most of the suspensions are for disciplinary reasons and are not very long. In the PHP script I read the file (only display student users), make changes with a form , save the specs in a MySql suspension log along with a restoration date and time. Now I want to overwrite the current file with the edited one. I also hope to have a cron write to the file also to automatically restore the privileges. As a brief experiment I expanded the permissions to the file and was able to write to it with PHP but if I do, after all, decide to do this I want to make as small of a security hole for php as possible so I am asking for security related ideas for enabling php to write to the passwd file. I've Googled, of course, and see some possibiliteies with htaccess. It seems like I could grant write privileges to php but wondered if I could get even more restrictive with htaccess so that only the actual php file could write? And any other ideas would be welcomed too, even including "What! Don't do it!". Thanks 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 -- 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 _ 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 -- 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_ 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
Re: [Ltsp-discuss] New LTSP Website / Wiki Launched
Hi Peter,
The person in charge of administrating and structuring the wiki is Wim
Muskee. You can always find him in #ltsp and #ltspweb (our website
discussion channel) on Freenode, as "knipwim". He can help you find or
create a place for this on the wiki. :-)
Kindest regards,
Jan Middelkoop
Recreatie en Zorg Groep B.V.
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On 10-10-12 18:29, Peter D Knight wrote:
Hi James
I have just spent a week setting up ltsp-pnp. A couple of things I
would like to inform others about. I would also like to put my details
of how to do it on the site. I could not find anywhere to do that.
Attached is what I put on paper.
I guess I could add edubuntu 12.05 ltsp-pnp to the installation and
trouble shooting sections.
May be you need to add a 'blog' part.
Great site!!
regards
Peter
On Thu, Aug 30, 2012 at 8:15 PM, James McQuillan <mailto:j...@mcquil.com>> wrote:
We've launched a new website for LTSP.org with a brand new Wiki.
We are seeing more and more LTSP Success Stories submitted and
increase in the use of technical content and documentation on the
Wiki.
For those who have successfully deployed LTSP in businesses,
schools, or elsewhere, please share your story on our world map by
visiting http://www.ltsp.org/stories/
For our technical readers, any contributions, additional content,
or enhancements you can make to the Wiki will help enable other
people deploying LTSP and using the Wiki for technical
documentation. http://wiki.ltsp.org
If you are a professional service provider for LTSP solutions, you
can add your company to the list of service providers by e-mailing
webmas...@ltsp.org.
We also welcome e-mails about website bugs as well as your
comments and ideas.
Thank You,
Jim McQuillan on behalf of the The LTSP Web Refresh Team
Alex Colcernian
Ron Colcernian
Jan Middelkoop
Wim Muskee
Jim McQuillan
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Re: [Ltsp-discuss] installation issues
If your server doesn't boot after modifying lts.conf you have some much bigger issues than you currently think. lts.conf is only used for booting clients, your server doesn't read it at boot. Changes in the file should never affect server boot. Perhaps you have installed the ltsp-client package on your server alongside the ltsp-server package? If so, then that's your problem. 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 09-08-12 22:43, Robert Lefebvre schreef: 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 <mailto:row...@ptd.net>> 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 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 <http://irc.freenode.net> -- 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/sfrnl04242012/114/50122263/ _ Ltsp-discuss mailing list. To un-subscribe, or change prefs, go
Re: [Ltsp-discuss] Ubuntu 12.04: two clients, identical options, only one connects
What happens when you manually run the xfreerdp command on TAG2011479? 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 18-06-12 23:46, David Burgess schreef: > Here are the relevant sections of my lts.conf: > > > [default] > TIMESERVER=172.21.35.0 > SHUTDOWN_TIME=17:30:00 > SCREEN_07=xfreerdp > RDP_SERVER=172.21.34.1 > RDP_OPTIONS="--ignore-certificate --no-nla -d GPRC -a 32 -f -x l" > KEEP_SYSTEM_SERVICES=acpid > X_BLANKING=300 > XINITRC_PROMPT_ON_EXIT=True > SOUND=False > RCFILE_01=/etc/ltsp/timeset > > [00:0c:29:c5:70:53] > HOSTNAME=virtual-tc > > [38:60:77:A3:82:27] > HOSTNAME=TAG2011479 > > > "virtual-tc" is a virtual machine. It boots fine and connects to the > RDP server. "TAG2011479" is an Atom/D515MW client that boots fine and > displays the Ubuntu splash screen at full resolution (1920x1080), but > instead of connecting to the RDP server displays a blank black screen > (but the display does not do to sleep). 'ps aux | grep rdp' and > 'netstat -nt' reveal that vitual-tc is running an xfreerdp process, > while TAG2011479 is not. Both clients are reporting the proper > hostname, indicating that they are reading lts.conf correctly to some > extent. > > Here is some command-line goodness for those who know. > > root@TAG2011479:~# hexdump -C /proc/1692/cmdline > 78 69 6e 69 74 00 2f 75 73 72 2f 73 68 61 72 65 |xinit./usr/share| > 0010 2f 6c 74 73 70 2f 78 69 6e 69 74 72 63 00 78 66 |/ltsp/xinitrc.xf| > 0020 72 65 65 72 64 70 20 20 2d 2d 69 67 6e 6f 72 65 |reerdp --ignore| > 0030 2d 63 65 72 74 69 66 69 63 61 74 65 20 2d 2d 6e |-certificate --n| > 0040 6f 2d 6e 6c 61 20 2d 64 20 47 50 52 43 20 2d 61 |o-nla -d GPRC -a| > 0050 20 33 32 20 2d 66 20 2d 78 20 6c 20 31 37 32 2e | 32 -f -x l 172.| > 0060 32 31 2e 33 34 2e 31 00 2d 63 6f 6e 66 69 67 00 |21.34.1.-config.| > 0070 2f 76 61 72 2f 72 75 6e 2f 6c 74 73 70 2d 78 6f |/var/run/ltsp-xo| > 0080 72 67 2e 63 6f 6e 66 00 2d 64 65 70 74 68 00 31 |rg.conf.-depth.1| > 0090 36 00 |6.| > 0092 > > > db > > -- > 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/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 -- 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/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
Re: [Ltsp-discuss] Sound just broke on Ubuntu 11.10 Oneiric, LTSP 5.2.16-0ubuntu7
On 13-06-12 08:28, Philip Loewen wrote: Unfortunately I don't really understand how pulseaudio is supposed to work across the network. Should a pulseaudio process be running also on the LTSP server? Seems like you have figured out most of it already. See pulseaudio as a sound 'server'. It provides a way for applications to play sound. The applications connect to the pulseaudio server, and pulseaudio directs that sound to an output device (a soundcard). The pulseaudio server should therefor always be running on the machine which has access to the sound device. In LTSP's case, applications running on the server, connect to pulseaudio running on the client, and pulseaudio there sends the audio to the local soundcard. So the pulseaudio process should be running on each client, and not on the server (unless you want to use the soundcard in the server, for whatever reason - but that's another story). You've already found the PULSE_SERVER export - that's how the server applications know where to send their audio streams to. You can use the command 'pactl' to connect to and control the server specified in PULSE_SERVER. For example, 'pactl info' shows the status of the pulseaudio server. As you've already determined the server isn't running on your client, this will not return anything useful. And that concludes this drive-by introduction to pulseaudio in LTSP. As for the specific problem you're having - the question you should be asking yourself is: what have you changed since the last time you ran ltsp-update-image? My experience is that usually these things do not happen 'spontaneously', despite obvious appearances. About your error: the LTSP code that is responsible for starting the pulseaudio daemon, can be found in /opt/ltsp//usr/share/ltsp/ltsp-init-common. You can find some pointers there, such as the exact arguments that LTSP uses to launch pulseaudio. You will see it calls pulseaudio with very different arguments than you used in your test case, therefor your test case (and any error messages you get from it) are unreliable. From the ltsp-init-common file, you can also see that LTSP instructs pulseaudio to log to the syslog - so be sure to check /var/log/syslog on the client. That's where the pulseaudio startup error messages will be. It might be the same as your test case... but then it might just not be. 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 -- 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/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
Re: [Ltsp-discuss] Sound just broke on Ubuntu 11.10 Oneiric, LTSP 5.2.16-0ubuntu7
Op 13-06-12 08:28, Philip Loewen schreef: > Unfortunately I don't really understand how pulseaudio is supposed to > work across the network. Should a pulseaudio process be running also on > the LTSP server? Seems like you have figured out most of it already. :-) See pulseaudio as a sound 'server'. It provides a way for applications to play sound. The applications connect to the pulseaudio server, and pulseaudio directs that sound to an output device (a soundcard). The pulseaudio server should therefor always be running on the machine which has access to the sound device. In LTSP's case, applications running on the server, connect to pulseaudio running on the client, and pulseaudio there sends the audio to the local soundcard. So the pulseaudio process should be running on each client, and not on the server (unless you want to use the soundcard in the server, for whatever reason - but that's another story). You've already found the PULSE_SERVER export - that's how the server applications know where to send their audio streams to. You can use the command 'pactl' to connect to and control the server specified in PULSE_SERVER. For example, 'pactl info' shows the status of the pulseaudio server. As you've already determined the server isn't running on your client, this will not return anything useful. And that concludes this drive-by introduction to pulseaudio in LTSP. As for the specific problem you're having - the question you should be asking yourself is: what have you changed since the last time you ran ltsp-update-image? My experience is that usually these things do not happen 'spontaneously', despite obvious appearances. ;-) About your error: the LTSP code that is responsible for starting the pulseaudio daemon, can be found in /opt/ltsp//usr/share/ltsp/ltsp-init-common. You can find some pointers there, such as the exact arguments that LTSP uses to launch pulseaudio. You will see it calls pulseaudio with very different arguments than you used in your test case, therefor your test case (and any error messages you get from it) are unreliable. From the ltsp-init-common file, you can also see that LTSP instructs pulseaudio to log to the syslog - so be sure to check /var/log/syslog on the client. That's where the pulseaudio startup error messages will be. It might be the same as your test case... but then it might just not be. :-) 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 -- 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/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
Re: [Ltsp-discuss] ubuntu 12.04 ltsp-pnp nbd problem
Hi Peter, As of 12.04, LTSP in Ubuntu no longer uses /etc/inetd.conf for serving NBD mounts. I'd suggest removing that line. Also interesting that your /etc/nbd-server/conf.d/ltsp_i386.conf is different than mine. For me the section is called [ltsp_i386] and for you it's [/opt/ltsp/i386]. I wonder why that is. I think you would get a different error if NBD wasn't running at all, but it wouldn't hurt to verify that it is. Type 'pidof nbd-server' in a terminal on the server. If that returns numbers, nbd-server is running. If it returns nothing, you can 'sudo service nbd-server start' to start it. 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 13-06-12 10:27, Peter D Knight schreef: client boots into initramfs dmesg shows unable to read squash super block added this to /etc/inetd.conf 2000stream tcpnowait nobody /usr/sbin/tcpd /usr/sbin/nbdrootd /opt/ltsp/images/i386.img nbd-serve/ltsp_i386.conf looks good [/opt/ltsp/i386] exportname = /opt/ltsp/images/i386.img readonly = true Help appreciated Peter -- Peter D Knight 22 Westfort Rd Houtbay 7806 +27(21)7903579 -- 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/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 -- 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/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
Re: [Ltsp-discuss] Change LTSP X Server Ip Address for a client based on MAC
Hi, Doing this based on IP is a bad idea, for two main reasons: 1.you can easily configure a different IP address to bypass 'security' 2.with LTSP thin clients all clients have the same IP address If you don't care about 1), then you can overcome 2) by creating different servers, or running browsers as local applications (or using fat clients) and switches to divide the network. Either way, the best way to accomplish what you're trying to do is to use Squid authentication to identify users and hand out permissions accordingly: http://wiki.squid-cache.org/Features/Authentication 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 12-06-12 00:23, Andrés Yacopino schreef: > Hi, I have deployed an UBUNTU LTSP Server 10.04. > I want to change the IP address of the X Server of LTSP do make some > clients have different IP Address to connect t an Squid Proxy Server. > I have a Proxy Server in which based on the Ip Address you are able to > see a group of web pages or the whole internet. > The LTSP Server is in the range of IP Address having restricted internet > acccess, I have the need to make some LTSP users have full privileges to > browse internet. > I have setup an Alias in the LTSP Server to have two differents ethernet > cards: > > eth0 = 10.1.1.1 > eth0:1 = 10.1.2.1 > > I was able to change the dhcp server to be able to boot (based on the > mac of the client) to the interface eth0:1 and the client adquiring the > ip adddress in the range to allow browsing internet. > The problem is that the client is using the same X Server, the address > of the interface eth0, not the new address for the SQUID Server. > > Doing: ps -ef | grep X11 I see: > > userid 8444 8362 0 Jun08 ?00:00:00 bash -c > LTSP_CLIENT=10.1.1.252 LTSP_CLIENT_HOSTNAME=ltsp1020 LC_ALL=es_AR.UTF-8 > LANGUAGE=es_AR.UTF-8 LANG=es_AR.UTF-8 DISPLAY=10.1.1.252:7 > /etc/X11/Xsession gnome-session< /dev/null> /dev/null ; > /usr/sbin/ltspfsmounter all cleanup > > Could I change a file in some place in the ltsp server to allow the > client to connect to the XServer in a different address (to 10.1.2.1 > instead of 10.1.1.1) based on the MAC of the client? > Thank you very much, > Regards, > Andres. > > -- > 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/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 -- 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/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
Re: [Ltsp-discuss] Test
What, you mean you've missed the discussion about the upcoming Windows-only version of LTSP? ;-) Regards, Jan Met vriendelijke groet, Jan Middelkoop Recreatie en Zorg Groep B.V. -- Website: http://www.recreatie-zorg.nl/ E-mail: j...@recreatie-zorg.nl Telefoon: +31 10 714 22 97 Op 08-05-12 08:56, Rolf-Werner Eilert schreef: > I haven't received any mails from this list since May 4, so this is just > a test if the list is still alive... > > -- > 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/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 -- 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/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
Re: [Ltsp-discuss] ltsp-remoteapps with ltsp-pnp
Hi Gymhaan, The ltsp-remoteapps command uses the existing SSH connection to the server (the one that is created on LTSP login). Try starting a simple application with "ltsp-remoteapps", for example, open a terminal on the fat client and type "ltsp-remoteapps xterm". What happens? :-) Met vriendelijke groet, Jan Middelkoop Recreatie en Zorg Groep B.V. -- Website: http://www.recreatie-zorg.nl/ E-mail: j...@recreatie-zorg.nl Telefoon: +31 10 714 22 97 Op 26-04-12 08:55, Gymhaan Rechenzentrum schreef: > Hi again, > I can't belive it is that easy... > > ok, remoteapps sounds good, but it is not working > on my system. > > I guess it is an ssh issue, because I also cannot > ssh to the server when working on a fatclient. > > Unfortunatly ltsp-remoteapps has no man-entry > and does not produce useable error messages. > > I remember reading something about identical > ssh keys on the ltsp-php Ubuntu website which is closed > now... > > So what do I have to do to ssh to the server > from a fatclient? > > I guess if this is fixed, I can use remoteapps as well... > > Thanks > > Roland > > > -- > 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/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 -- 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/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
Re: [Ltsp-discuss] reverse localapps
You mean something like the client command "ltsp-remoteapps"? :-) Kindest regards, Jan Middelkoop Recreatie en Zorg Groep B.V. -- Website: http://www.recreatie-zorg.nl/ E-mail: j...@recreatie-zorg.nl Telefoon: +31 10 714 22 97 Op 25-04-12 12:47, Gymhaan Rechenzentrum schreef: > Hi again, > I am satisfied in an entirely new lewel. > ltsp-pnp works great with all sorts of hardware. > > Thanks again to Alkis and Stéfane. > > I just wonder if I can use a "reverse-localapps" on my small clients. > > If I run them as fatclients they are really slow, > especially with firefox and libreoffice, which are used 90% > of the time. > > If I run them as thinclients, the applications are fast as usual, > running on the server, but the login is very slow, because unity > needs lots of time on the server. > > Best would be to run a fatclient that runs special applications > on the server, just the revers of the old "local-apps". > That would transform my terminal-server to an application server > for selectet apps. > > Switching the flag Local-Apps=False does not work, > you can login, but unity does not start and you are logged out again. > > It is no problem to replace the standard icons from the starter and > replace them with new "server-apps" starters if needed. I did this the > other way > round with local-apps before. > > Greetings > Roland > > PS: I just wrote this from a fatclient, running ltsp-pnp. Since > yesterday I got everthing running and > at the moment next door 20 Students work with the new system producing > an 0.2% cpu-usage on my > server...GREAT! > > > -- > 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/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 -- 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/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
Re: [Ltsp-discuss] printer from fat clients
Looking at the LTSP code, it seems to be default for LTSP to configure
CUPS for remote printing, but only if LOCAL_APPS=True... so I'm not
sure if that applies to fat clients.
Seems like LTSP accomplishes it by editing /etc/cups/client.conf on the
client.
# if cups is installed in the chroot, use LDM_SERVER for printing
if [ -d /etc/cups ]; then
if [ -n "${CUPS_SERVER}" ]; then
echo "ServerName ${CUPS_SERVER}" > /etc/cups/client.conf
else
echo "ServerName ${LDM_SERVER}" > /etc/cups/client.conf
fi
fi
I bet someone else can jump in and tell you much more about this than I can.
Met vriendelijke groet,
Jan Middelkoop
Recreatie en Zorg Groep B.V.
--
Website: http://www.recreatie-zorg.nl/
E-mail: j...@recreatie-zorg.nl
Telefoon: +31 10 714 22 97
Op 30-03-12 15:42, Todd O'Bryan schreef:
> OK, I'm game. How would I go about that?
>
> On Fri, Mar 30, 2012 at 10:57 AM, Jan Middelkoop
> wrote:
>> All CUPS (common unix printing system) configuration is stored in the
>> /etc/cups/ directory. There are the config files you want.
>>
>> Wouldn't it be easier though to just configure CUPS on the server
>> correctly. and make the client's use the CUPS service on the server for
>> printing, rather than their own? (I'm assuming that's possible.)
>>
>> Met vriendelijke groet,
>>
>> Jan Middelkoop
>> Recreatie en Zorg Groep B.V.
>>
>> --
>> Website: http://www.recreatie-zorg.nl/
>> E-mail: j...@recreatie-zorg.nl
>> Telefoon: +31 10 714 22 97
>>
>>
>> Op 30-03-12 12:33, Todd O'Bryan schreef:
>>> I can indeed install cups in the client image. How and where do I set
>>> up the printer, given that I can't actually *run* the client image
>>> from the server? I suppose if I install the printer on another
>>> computer, I could just copy the config files, but does someone know
>>> which files I need to copy?
>>>
>>> On Thu, Mar 29, 2012 at 1:24 PM, Peter D Knight
>>> wrote:
>>>> use cups to setup the network printer. http://localhost:631
>>>> root as the user name and your admin password needed.
>>>> At home I setup a windows printer and the fat client saw it when using
>>>> libre word, without any extra work.
>>>> At a school I installed cups server in the image.
>>>> Peter
>>>>
>>>> On Thu, Mar 29, 2012 at 2:59 PM, Todd O'Bryan
>>>> wrote:
>>>>> Hey all,
>>>>>
>>>>> I just switched my lab to Kubuntu 11.10 using LTSP fat clients, but
>>>>> now I can't print from the clients. Users can't even set up the
>>>>> printer, because the printer configuration tool returns an error:
>>>>>
>>>>> --
>>>>> The service 'Printer Configuration' does not provide an interface
>>>>> 'KCModule' with keyword
>>>>> 'system-config-printer-kde/system-config-printer-kde.py' The factory
>>>>> does not support creating components of the specified type.
>>>>>
>>>>> Possible reasons:
>>>>>* An error occurred during your last KDE upgrade leaving an orphaned
>>>>> control module
>>>>>* You have old third party modules lying around.
>>>>> Check these points carefully and try to remove the module mentioned in
>>>>> the error message. If this fails, consider contacting your distributor
>>>>> or packager.
>>>>> --
>>>>>
>>>>> I have a printer on the network that acts like an HP JetDirect
>>>>> printer. Any idea how to (a) let users add it, or (b, and preferably)
>>>>> add it to all the fat clients in one swell foop?
>>>>>
>>>>> Thanks!
>>>>> Todd
>>>>>
>>>>>
>>>>> --
>>>>> This SF email is sponsosred by:
>>>>> Try Windows Azure free for 90 days Click Here
>>>>> http://p.sf.net/sfu/sfd2d-msazure
>>>>> _
>>>>> 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
>>>>
>>&
Re: [Ltsp-discuss] printer from fat clients
All CUPS (common unix printing system) configuration is stored in the /etc/cups/ directory. There are the config files you want. Wouldn't it be easier though to just configure CUPS on the server correctly. and make the client's use the CUPS service on the server for printing, rather than their own? (I'm assuming that's possible.) Met vriendelijke groet, Jan Middelkoop Recreatie en Zorg Groep B.V. -- Website: http://www.recreatie-zorg.nl/ E-mail: j...@recreatie-zorg.nl Telefoon: +31 10 714 22 97 Op 30-03-12 12:33, Todd O'Bryan schreef: > I can indeed install cups in the client image. How and where do I set > up the printer, given that I can't actually *run* the client image > from the server? I suppose if I install the printer on another > computer, I could just copy the config files, but does someone know > which files I need to copy? > > On Thu, Mar 29, 2012 at 1:24 PM, Peter D Knight wrote: >> use cups to setup the network printer. http://localhost:631 >> root as the user name and your admin password needed. >> At home I setup a windows printer and the fat client saw it when using >> libre word, without any extra work. >> At a school I installed cups server in the image. >> Peter >> >> On Thu, Mar 29, 2012 at 2:59 PM, Todd O'Bryan wrote: >>> Hey all, >>> >>> I just switched my lab to Kubuntu 11.10 using LTSP fat clients, but >>> now I can't print from the clients. Users can't even set up the >>> printer, because the printer configuration tool returns an error: >>> >>> -- >>> The service 'Printer Configuration' does not provide an interface >>> 'KCModule' with keyword >>> 'system-config-printer-kde/system-config-printer-kde.py' The factory >>> does not support creating components of the specified type. >>> >>> Possible reasons: >>> * An error occurred during your last KDE upgrade leaving an orphaned >>> control module >>> * You have old third party modules lying around. >>> Check these points carefully and try to remove the module mentioned in >>> the error message. If this fails, consider contacting your distributor >>> or packager. >>> -- >>> >>> I have a printer on the network that acts like an HP JetDirect >>> printer. Any idea how to (a) let users add it, or (b, and preferably) >>> add it to all the fat clients in one swell foop? >>> >>> Thanks! >>> Todd >>> >>> >>> -- >>> This SF email is sponsosred by: >>> Try Windows Azure free for 90 days Click Here >>> http://p.sf.net/sfu/sfd2d-msazure >>> _ >>> 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 >> >> >> >> -- >> Peter D Knight >> 22 Westfort Rd >> Houtbay >> 7806 >> +27(21)7903579 >> >> -- >> This SF email is sponsosred by: >> Try Windows Azure free for 90 days Click Here >> http://p.sf.net/sfu/sfd2d-msazure >> _ >> 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 >> > -- > This SF email is sponsosred by: > Try Windows Azure free for 90 days Click Here > http://p.sf.net/sfu/sfd2d-msazure > _ > 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 -- This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure _ 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
Re: [Ltsp-discuss] weird issue with LDM and passwords containing @ symbol
Scratch that. There is already a bug about it: https://bugs.launchpad.net/ltsp/+bug/948507 You can vote for that bug, or comment on it if you have extra information. Met vriendelijke groet, Jan Middelkoop Recreatie en Zorg Groep B.V. -- Website: http://www.recreatie-zorg.nl/ E-mail: j...@recreatie-zorg.nl Telefoon: +31 10 714 22 97 Op 29-03-12 15:16, Jan Middelkoop schreef: > Hi Todd, > > This has also been reported in the K12Linux mailing list recently. > Please file a bug at https://bugs.launchpad.net/ltsp/+filebug > > Kindest regards, > > Jan Middelkoop > Recreatie en Zorg Groep B.V. > -- This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure _ 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
Re: [Ltsp-discuss] weird issue with LDM and passwords containing @ symbol
Hi Todd, This has also been reported in the K12Linux mailing list recently. Please file a bug at https://bugs.launchpad.net/ltsp/+filebug Kindest regards, Jan Middelkoop Recreatie en Zorg Groep B.V. -- Website: http://www.recreatie-zorg.nl/ E-mail: j...@recreatie-zorg.nl Telefoon: +31 10 714 22 97 Op 29-03-12 15:06, Todd O'Bryan schreef: > Sorry for the multiple posts, but I'm cleaning out some issues I've > discovered. > > I assign random passwords to students and when a student with an @ > symbol tries to enter his password, the enter key just won't work on > the LDM login screen. Any idea what's going on? The workaround was to > change his password to something without an @, but this could really > confuse people. > > Todd > > -- > This SF email is sponsosred by: > Try Windows Azure free for 90 days Click Here > http://p.sf.net/sfu/sfd2d-msazure > _ > 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 -- This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure _ 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
Re: [Ltsp-discuss] X_COLOR_DEPTH=16 by default for thin clients
Hi Alkis and Ben, PNG uses a color palette. So "8-bit" in PNG means, 256 colors - any colors. They're not pre-determined. It can be 256 different shades of light blue if you want. So an 8-bit PNG can easily contain colors which can't be displayed on a 16-bit mode display. Met vriendelijke groet, Jan Middelkoop Recreatie en Zorg Groep B.V. -- Website: http://www.recreatie-zorg.nl/ E-mail: j...@recreatie-zorg.nl Telefoon: +31 10 714 22 97 Op 27-03-12 09:58, Ben Green schreef: > Quoting Alkis Georgopoulos: > >> The blue LDM background only has 256 colors, i.e. 8 bpp, in order to be >> < 4k size, that's why it appears banded no matter your display color >> depth. It would make no difference at all if you displayed it in 8 bpp, >> 15/16 bpp, or 24/32 bpp displays. > That's simply not true Alkis, with 16-bit colour I see bands, with > 32-bit no bands. I can provide pictures if you like. Its not a > complaint about the picture quality, I'm just saying the difference is > very visible. > > Cheers, > == > From Ben Green > > > -- > This SF email is sponsosred by: > Try Windows Azure free for 90 days Click Here > http://p.sf.net/sfu/sfd2d-msazure > _ > 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 -- This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure _ 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
Re: [Ltsp-discuss] X_COLOR_DEPTH=16 by default for thin clients
X_COLOR_DEPTH=16 here too. The extra resolution (which is hardly visible) doesn't outweigh the performance hit (which is very much visible). I think it's a good idea if it becomes default. :-) Met vriendelijke groet, Jan Middelkoop Recreatie en Zorg Groep B.V. -- Website: http://www.recreatie-zorg.nl/ E-mail: j...@recreatie-zorg.nl Telefoon: +31 10 714 22 97 Op 26-03-12 09:05, Alkis Georgopoulos schreef: > By default, X_COLOR_DEPTH is 32 for thin clients, which means that a > 320x240 youtube video needs 73.728.000 bps bandwidth (30 fps, 32 bpp). > > Setting X_COLOR_DEPTH=16 for thin clients makes that video need exactly > half the bandwidth, i.e. 36.864.000 bps. > > Of course that doesn't only affect videos. Any thin clients screen > updates need half the bandwidth with X_COLOR_DEPTH=16. > > Less bandwidth means faster responses, less CPU usage (especially with > the default LDM_DIRECTX=False), and support for more clients with the > same CPU/LAN constrains. > > So I propose a change in upstream LTSP to set X_COLOR_DEPTH=16 by > default, if: >* LTSP_FATCLIENT is not set (fat clients would still default to 32), >* LOCAL_APPS_MENU is not set (so 32 for localapps browsers too), >* X_COLOR_DEPTH is not set at all (so X_COLOR_DEPTH="" in lts.conf > reverts to the old behavior). > > > Is that what most LTSP users would like? Comments, please... :) > > If not, then I'll implement an X_COLOR_DEPTH=auto instead, which would > give the above behavior (16 on thins, 32 on fats/localapps) only when > requested from lts.conf. > > -- > This SF email is sponsosred by: > Try Windows Azure free for 90 days Click Here > http://p.sf.net/sfu/sfd2d-msazure > _ > 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 -- This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure _ 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
Re: [Ltsp-discuss] Xorg uses all the CPU.
Some tweaks you can do to get Xorg CPU usage down, in lts.conf: X_COLOR_DEPTH=16 LDM_DIRECTX=True Read the manpage for lts.conf what these are exactly. Enabling LDM_DIRECTX could pose a security threat on networks where packet sniffing might be an issue. On the other hand, if you trust the people connected to your LTSP network, you could very well enable it. Met vriendelijke groet, Jan Middelkoop Recreatie en Zorg Groep B.V. -- Website: http://www.recreatie-zorg.nl/ E-mail: j...@recreatie-zorg.nl Telefoon: +31 10 714 22 97 Op 14-03-12 09:43, relosrl schreef: > The server, the client and the net is overdimensioned. The client has > slowing downs when it manages modifications of screen. Sometimes it > stops completely for 1 or 2 seconds. If I use "top" on local bash, I see > that it's xorg to occupy all the resources. Radeon module is on and > glxinfo is ok. If I start OS on client I haven't problem with xorg. > Ubuntu 64 for server. 386 image for client. Xfce or TDE is equal. > What can I do for resolve the problem? > Thanks. > Rodolfo > > -- > Virtualization& Cloud Management Using Capacity Planning > Cloud computing makes use of virtualization - but cloud computing > also focuses on allowing computing to be delivered as a service. > http://www.accelacomm.com/jaw/sfnl/114/51521223/ > _ > 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 -- Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _ 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
