IRC chat logs for #ltsp on irc.freenode.net (webchat)


Channel log from 26 December 2014   (all times are UTC)

00:20brcisna has joined IRC (brcisna!d8187608@gateway/web/freenode/ip.216.24.118.8)
00:20
<brcisna>
Hello Has anyone done any recent installs of LTSP?
00:24
<vagrantc>
brcisna: do you have a more specific question?
00:25
<brcisna>
yes,,hello vagrant,,,i have tried doing 3 installs to same server with CentOS 6.6 and ltsp,,,when i log in as a user the user is root,,at the desktop?
00:28
<vagrantc>
you try to log in as a user, and you end up with a session as the root user?
00:28
<brcisna>
yes exactly
00:29
vagrant I have used k12linux/ltsp for over 11 years now,,,first time,this has ever happened.
00:31
I'd be glad to email you the secure/log,it is very obcvious in log,,,, testuser is authenticated by pam_unix,,then next line root is trying to be authenticated by sshd.
00:38
<vagrantc>
i can't fathom anything ltsp-specific that would do that.
00:39
when you ssh as a user, do you end up with root's shell?
00:42
<brcisna>
ok,,let me give some more info,,, after initial install i was getting the deaed login ,,enter username/password,,,,and the screen hangs for 30 seconds,,,then back out to login,,I thought it was sshkeys needed regenerated,,,of course,,,,this didnt solve the prob,,,so looking at secure logs i was seeing that root w.... failed password for root password.... so i generated authorized_keys for root on server,,and copied to chroot/root/ssh,,
00:43
,,,,but,,, the user is root,,,as shown in the upper right of desktop..
00:44
i know,,,sounds crazy,,I have re-installed two more times,,i deleted /etc/ltsp,,/var/lib/tftpboog,,and /opt/ltsp uninstal;ll all ltsp packages and started from scratch each time!
00:45
if you like i can give you a URL you can webmin into the machine,my email is brcisna@gmail.com
00:47
also,,,worth mentioning,,i noticed when doing ltsp-update-sshkeys the machine name and the ipaddress isn't being parsed,,,,when looking at /opt/ltsp/known_hosts the server name is always just server,,maybe this is something new in install scripts,,this does not seem right to me,
00:47
<vagrantc>
brcisna: when you ssh as a user, do you end up with root's shell?
00:48
leave ltsp out of it.
00:48
<brcisna>
ok,,,never tried that let me try,,hang on please,
00:48
<vagrantc>
why all the use of "," ?
00:49
essentially, that's what LDM does to log in ... it run an ssh connection to the server as the user
00:50
<brcisna>
vagrant i just sshd to the server from my home here i am a regular user when sshing to it.
00:51
one thing,,i should mention also,,,,i enable ONLY shell as a winodw option,,whne i power on a client,,i randomly see ldm:[###] segfault at 8 ip.....may see 8 lines of this then end up at bash prompt as expcected..
00:52
<vagrantc>
it doesn't make any sense, and i have my own inscrutible problems to debug at the moment... sorry.
00:52
hopefully someone else can help.
00:52
<brcisna>
ok,,sure,,thanks for trying,,,,,have a good weekend vangrant..
00:53
<vagrantc>
brcisna: though i would recommend using , more sparingly ...
00:55
<brcisna>
thanks.
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02:43
<brcisna>
hello anyone here to discuss ltsp new install problem.
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03:50
<Dkauf>
Hello. I have a question. I am trying to install LTSP on to a dell poweredge 2950 and it doesnt seem to like ubuntu. So I am going with suse. Now here is the problem. we have a windows based server that is handling all the DCHP and I want to keep it that way. I cannot seem to find any docs that tell me how to allow this to happen with LTSP
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04:09
<vagrantc>
dkauf: try proxy dhcp
04:09
!proxydhcp | echo dkauf
04:09
<ltsp>
dkauf proxydhcp: A proxy DHCP server is defined by the PXE specification as a server which sends auxiliary boot information to clients, like the boot filename, tftp server or rootpath, but leaves the task of IP leasing to the normal DHCP server. More info: https://help.ubuntu.com/community/UbuntuLTSP/ProxyDHCP
04:10
<vagrantc>
but that only works if there aren't other network boot services on your network
04:10
alternately, you just have to specify all the dhcp options relevent to network booting in your windows dhcp server... no experience with that
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04:42
<Dkauf>
Vakrantic I got booted when my laptop died but checked the logs and I will give that a try. There is nothing else on the network that is trying to PXE boot or anything like that. Only the LTSP will be booting in that mannor
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05:42
<thangamaniarun>
Hi LTSP Team & users
05:44
We use LTSP Server with 30 Clients at schools
05:45
Plan to introduce Video Editing Softwares to teach multimedia in the ICT syllabus
05:46
We try experiment with OpenShot
05:46
But it is hanging..
05:47
Kindly give your thoughts and suggest us light weight video editor
07:15
any answer?
07:42
<vagrantc>
thangamaniarun: you'll probably need to use fat clients or at least localapps
07:43
thangamaniarun: and the clients will probably have to be fairly powerful
07:43
multimedia tends to be problematic for thin clients
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08:48
<thangamaniarun>
vagrantc: thanks for your input.
08:50
vagrantc: is it possible to use the existing infrastructure if we plan to use fat clients?
08:51
We use Ubuntu 12.04 LTSP right now
09:02
<vagrantc>
thangamaniarun: what existing infrastructure?
09:03
thangamaniarun: basically, you'll have to experiment a bit
09:03
thangamaniarun: every software is a bit different, and how individual users use it is a bit different
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09:18
<thangamaniarun>
vagrantc: We use LTSP Server with 30 Clients at school LAB
09:20
<vagrantc>
thangamaniarun: it all depends on your hardware and the use case ...
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09:20
<vagrantc>
thangamaniarun: you really need to do a little experimentation to find out.
09:21
<thangamaniarun>
vagrantc: Yes you are correct.
09:21
vagrantc: we will try possible solution to have multimedia in the LAB :)
09:21
<vagrantc>
thangamaniarun: basically, running them as fat clients requires about the same amount of ram as your applications on each client.
09:22
so if your application needs 1GB of ram to run, you need 1GB of ram free on your client, plus whatever ram it takes to run your desktop environment and whatever other applications you might run
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09:22
<vagrantc>
thangamaniarun: if you have less than 1GB of ram in your clients, i doubt it will work well.
09:22
<thangamaniarun>
i understand.
09:22
<vagrantc>
thangamaniarun: but 2 or even 4GB in your clients might not be enough...
09:23
<thangamaniarun>
i think less RAM. anyway i will check with my team
09:23
<vagrantc>
good luck!
09:23
<thangamaniarun>
vagrantc: thanks for your clarifications.
09:24
<vagrantc>
the good thing about fat clients is it doesn't require a powerful server
09:25
but it requires more powerful clients ... but basically anything that runs ok on a disked install should run OK on the same hardware as a fat client.
09:36* vagrantc waves
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09:37
<thangamaniarun>
thanks
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14:57
<mike123>
Hello to all !
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17:46
<alkisg>
!local-boot
17:46
<ltsp>
local-boot: If you want LTSP fat clients on a low-speed network, you can put i386.img on e.g. C:\Boot\LTSP\i386.img and use this command line in pxelinux.cfg: APPEND ro initrd=ltsp/i386/initrd.img init=/sbin/init-ltsp root=/dev/sda1 rootflags=ro loop=/Boot/LTSP/i386.img; IPAPPEND 3
17:48
<muppis>
alkisg, is there way to do that with wlan?
17:49
<alkisg>
muppis: sure, you just need to statically configure the network inside the chroot
17:49
It will be brought up normally, not from initramfs, so you don't need anything special
17:50
<muppis>
Cool.
17:50* alkisg is trying to do that via grub + multiboot usb stick currently...
17:50
<alkisg>
I'm creating a usb stick that can boot windows, ubuntu, ipxe, in i386, amd64, efi etc etc
17:51
<muppis>
I was trying to bring network up from initramfs.
17:52
<markit>
hi alkisg :) hope you have a nice holiday these days
17:52
<alkisg>
Hi markit , same to you!
17:54* muppis had hands on Jolla and was making patches for Sailfish OS. :D
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18:21
<alkisg>
Yey, booted with the first try! An ltsp client that boots off of a usb stick, with grub2 > loopback > (stick)/boot/bootisos/i386.img
18:21
Now to create another script that transforms that "ltsp client" to an ltsp server, that serves (stick)/boot/bootisos/i386.img to the local network... :)
18:22
...reusing the same image for both booting the ltsp server from a live stick and for the clients
18:25
<vagrantc>
at some point you just need a cluster of machines all running the same services ... and if any one of them goes down, no big deal! :)
18:25
<alkisg>
cat /proc/cmdline: BOOT_IMAGE=(loop)/boot/vmlinuz ro initrd=/boot/initrd.img init=/sbin/init-ltsp root=LABEL=LinData rootflags=ro loop=/boot/bootisos/i386.img ip=:10.161.254.11:::
18:26
Haha, true, that would be ideal...
18:26
"your pc just exploded, your running session got transferred to another pc beside you, go there and continue working " :)
18:27
Reusing the live server image as a client image too is good because of the caching, it needs half the ram
18:27
...and half time loading it
18:27
<vagrantc>
"a network glitch has resulted in multiple machines all claiming to be the one true server, and as a consequence, your client has been appropriated for domination of the one true server."
18:28
<alkisg>
World conquest!! /me can see his pupils playing for hours with that scenario...
18:32
Hmm... I wonder if I'm running nbd-client for swap, can I also run nbd-server for (stick)/i386.img, or am I risking deadlocks? I think it should be fine...
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19:04
<alkisg>
Trick: /etc/lts.conf speficies parameters for the live server (e.g. keep lightdm/sshd/nbd-server, add a live user...), while /var/lib/tftpboot/ltsp/i386/lts.conf specifies parameters for the live ltsp clients
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19:25
<brcisna>
hello, anyone here to discuss ltsp problem?
19:27
<alkisg>
!ask
19:27
<ltsp>
ask: Don't ask to ask a question, simply ask it, and if someone knows the answer, they'll respond. Please hang around for at least a full hour after asking a question, as not everybody constantly monitors the channel.
19:28
<brcisna>
Ok, have a problem with install of ltsp on centOS 6.6 any user that logs in froma client is root at the desktop?
19:30
<alkisg>
I don't think anyone is maintaining ltsp on centos currently, you might want to switch to ubuntu, debian, opensuse etc, ....
19:30
<brcisna>
Ok thanks..
19:30
<alkisg>
...but, if you want, try with LDM_XSESSION="/usr/bin/xterm" in order to have the simpler environment
19:31
<brcisna>
does anyone know if it is possible to change from ldm to gdm login manager in the chroot?.
19:31
<alkisg>
No, it's not easily possible
19:31
ldm does special things to make remote logins possible, using ssh etc
19:31
<brcisna>
Ok I will try your suggestion to see how this works,I will report back,,,in maybe 30 mins.
19:35
<alkisg>
Note that I don't think anyone will want to spend a lot of time helping you fix LTSP on centos, so my suggestion is to change distribution if you want LTSP... :)
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19:38
<brcisna>
OThanks,,I know CentOS is sooo yesterday:)..
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19:38
<alkisg>
No it's fine, the problem is that noone maintains ltsp there
19:41
vagrantc: if for some reason I have [Default] RM_SYSTEM_SERVICES=ssh, and [mac] KEEP_SYSTEM_SERVICES=ssh, do you expect ssh to be kept or removed? Currently it's removed...
19:41
I.e. KEEP_SYSTEM_SERVICES now only refers to our hardcoded default list of RM_SYSTEM_SERVICES, not to the user defined one
19:48
<vagrantc>
alkisg: oh, i would expect that to be kept
19:48
ah, that's true ... hrm.
19:49
<alkisg>
!learn alkisg-todo as make KEEP_SYSTEM_SERVICES override user-defined RM_SYSTEM_SERVICES
19:49
<ltsp>
The operation succeeded.
19:50
<vagrantc>
alkisg: this may be a case where using CAPS should only be used for user-defined settings, and internals should be lowercase ... or setting some standard like that
19:54
<alkisg>
The internal list here is not used as "defaults", but as a list of values to apply *additionally* to RM_SYSTEM_SERVICES, and supposedly one can keep some of those services by using KEEP_SYSTEM_SERVICES,
19:54
...so I don't think lowercase/internal variables would help here... I think it's just a normal bug
19:58
<brcisna>
alkisg i switched the lts.conf to LDM_XSESSION="/usr/bin/xterm" rebooted client the machine still come up to lstp login,is this correct? the machine is still trying to log in as root right behind the actual user?
19:59
<alkisg>
Did you get a root xterm or a root session?
20:00
You were supposed to get a prompt, yes, and then get to a root xterm (or a user xterm)
20:00
<brcisna>
machine come up to the usual LTSP background same as ldm.
20:00
<alkisg>
Is that session on the server or on the client? Do you see root@server as the prompt, or root@ltsp123?
20:00
(if you open a terminal)
20:01
<brcisna>
ok,ill try,switching session
20:01
xterm
20:01
i am doing through nxeserver to remote building,,running pxeclient in virtualbox,I am at home server is at school building.
20:05
alkisg,while i am trying to get a decent connection to remote ltsp server,would it do me any good to get the ldm rpm/deb source and build this target/CentOS server and see if it makes any difference,?
20:06* alkisg needs to go, later...
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20:06
<brcisna>
ok sure.
20:13
<vagrantc>
eeeyk. abuse of LDM_XSESSION...
20:13
it is for troubleshooting purposes, at least.
20:17
<brcisna>
Ok thanks,,for info vagrant. i have a heck of a time nxing to remote then running virtualbox for pxeclient
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20:21
<brcisna>
vagrant,I would like to try and maybe rebuild the ldm rpm or deb on this CentOS server. When I do a shell login,i do randomly see "ldm[##]: segfault at 8 ip and then drops down to the expected bash prompt
20:21
i ment to say src.rpm of ldm.
20:48
<vagrantc>
redhat/fedora-based systems really need someone to care for LTSP... it's been years since it's had someone caring for those on a regular basis
20:52
<brcisna>
agreed. i used the very first verion of lk12ltsp,based on fedora,maybe 12 years ago?..
20:53
i am almost postive the problem,i am having is the ldm piece but don't know how to rectify the problem,i done two installs of ltsp about 6 months ago,on CentOS,and worked fine.
21:06
<vagrantc>
i would be shocked if LDM has been updated in CentOS, which makes me think something is broken in your ssh server.
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21:22
<brcisna>
vagrantc I guess i don't understand in that lLDM is not a package for CentOS? I would agree,I think my problem,is LDM related. Wish there was some way to install an alternative.easily such as anabling gdm.on chroot.
21:29
<vagrantc>
if it's not a package for CentOS, how are you running it at all?
21:30
all the components of LTSP, including LDM, require integration into the distribution you're running it on ... it's not just an application you can compile and expect to work
21:34
<brcisna>
Ok,,makes sense..
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