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


Channel log from 19 January 2015   (all times are UTC)

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01:03
<avamoore>
hi, is there a quick and easy "do it all solution" to run on a server in addition to a ltsp computer, i.e. users in the ldap, nfs/samba, single sign-on, mail, wiki..
01:03
Perhaps Zentyal as I'm seeing it still exists and its latest version is on ubuntu 14.04.
01:05
maybe this is not the best place to have that discussion but you can have ltsp as "the desktop" (with maybe dhcp, etc.) but then you may need "the server" too.
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01:10
<avamoore>
reformulated question : is it easy to integrate ltsp with LDAP?
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04:53
<cyberorg>
avamoore, yes, ltsp does not need any integration, as long as ssh can authenticate against ldap it will work
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06:39
<austrian>
I should have a writeup done on LDAP authentication shortly. Couple of points that need to be addressed with it. One of the parts that most wiki's leave out is that LDM authenticates differently than LTSP does.
06:41
One of the issues I see in the forums is that you can log in on a terminal but when logging in through LDM it fails. I'm currently suffering through that on a LTSP-PNP install.
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06:53
<ltsp_fan>
Hello, thank you to the ltsp team. I have a working ltsp setup, only one client is giving me trouble, it pxeboots but hangs after it receives the dhcp info. syslog on the server's last comment is that a valid nfs mount request has been received. Any further troubleshooting tips?
06:59
<work_alkisg>
!quiet-splash
06:59
<ltsp`>
quiet-splash: to disable the splash screen in Ubuntu, in order to see any boot error messages, run sudo gedit /var/lib/tftpboot/ltsp/i386/pxelinux.cfg/default and remove quiet splash plymouth:force-splash vt.handoff=7
06:59work_alkisg is now known as alkisg
06:59
<alkisg>
ltsp_fan: do that ^
06:59
Also mention distro/version
07:02
<ltsp_fan>
Debian Wheezy ( Debian 3.2.65-1 x86_64 GNU/Linux)
07:03
the splash screen doesn't even load
07:04
the client stops after the last line from the dhcp is displayed: filename: /ltsp/i386/pxelinux.0
07:12
<alkisg>
ltsp_fan: nevertheless do it and tell us the messages, it produces more messages before splash too
07:18
<ltsp_fan>
The only mention of the word quiet in that file is on the line:append ro initrd=initrd.img-3.2.0-4-486 init=/sbin/init-ltsp root=/dev/nfs ip=dhcp boot=nfs
07:18
before the word root (which I have removed above)
07:18
after restarted the dhcp server I see no difference in the info displayed
07:18
<alkisg>
Yup that's it
07:19
It should now mention "Loading vmlinuz....."
07:19
While before, it shouldn't display it
07:19
It should also display a bunch of kernel messages
07:19
Lots of screens of messages, before hanging
07:19
<ltsp_fan>
unfortuntaley it hangs after the line I wrote above at 9:04
07:20
<alkisg>
There's something not quite matching with what you say (excuse my poor english),
07:20
the boot process goes like this:
07:20
dhcp request etc,
07:20
then the client loads pxelinux.0 from tftp,
07:21
then pxelinux loads the kernel and *if* quiet is disabled, echoes "loading kernel" etc,
07:21
then initramfs is loaded and executed and finally it tries to mount root via nfs,
07:21
<ltsp_fan>
yes dhcp, but no evidence the kernel gets loaded
07:21
<alkisg>
so, at *that* point you should be seeing the nfs message in syslog
07:21
So, if you're seeing nfs messages from the booted client, it doesn't match what you're saying
07:22
"syslog on the server's last comment is that a valid nfs mount request has been received. "
07:22
<ltsp_fan>
let me post the syslog line
07:22
<alkisg>
Not yet,
07:22
Try booting the client again and verify that each time that you boot the client, you see such a lijne
07:22
*line
07:22
<ltsp_fan>
Jan 19 09:15:15 apm rpc.mountd[2799]: authenticated mount request from 192.168.67.26:935 for /opt/ltsp/i386 (/opt/ltsp)
07:23
the ip address matches
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07:24
<ltsp_fan>
yes, i do see that line every time it boots
07:24
<alkisg>
Hence what I'm saying about something being totally wrong :)
07:25
You can't have nfs mounts before the kernel is downloaded...
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07:25
<alkisg>
Are you using tftpd-hpa?
07:25
Try putting --verbose in /etc/default/tftpd-hpa to have tftp messages in syslog too
07:25
So that you see if the kernel is downloaded or not
07:26
Are you sure you removed "quiet" from the correct place?
07:26
<ltsp_fan>
yes tftpd-hpa
07:26
<alkisg>
And also if you can try booting the client with ipxe instead of its internal pxe stack
07:26
!ipxe
07:26
<ltsp`>
ipxe: iPXE is the successor to the etherboot/gPXE project, and can be used to netboot clients that don't have a NIC ROM with a PXE stack. To add it to grub, see !grub-ipxe. To add it to the Windows boot loader, see !win32-loader. To download floppy, CD or USB images, visit http://ipxe.org or install the ipxe package.
07:28
<ltsp_fan>
before I removed quiet: append ro initrd=initrd.img-3.2.0-4-486 init=/sbin/init-ltsp quiet root=/dev/nfs ip=dhcp boot=nfs
07:28
about ipxe can I dd the iso image directly to the (unused) hard drive?
07:29
!grub-ipxe
07:29
<ltsp`>
grub-ipxe: http://packages.ubuntu.com/grub-ipxe can be used to add a "Boot from network" option to grub2.
07:29
<alkisg>
Yes, but how will you boot the client in order to run dd?
07:29
<ltsp_fan>
usb?
07:29
<alkisg>
Then why not put ipxe to usb instead? :)
07:29
<ltsp_fan>
sure but as a permanent solution?
07:29
<alkisg>
You can do that from within ltsp then don't worry about permanent
07:30
Sure you can dd it to the disk
07:30
<ltsp_fan>
ok when we get there I'll ask you what you mean
07:30
<alkisg>
OK
07:31
Note that you might be changing /var/lib/tftpboot/ltsp/i386/pxelinux.cfg/default while tftpd-hpa might be accessing /srv/tftp/ltsp/i386/pxelinux.cfg/default
07:31
<ltsp_fan>
yes i was wondering about that
07:32
oops: TFTP_DIRECTORY="/srv/tftp"
07:35
yip more info now
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07:36
<ltsp_fan>
the last few lines: nfs-premount ... done
07:36
the last few lines: nfs-bottom ... done
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07:37
<alkisg>
ltsp_fan: do you get an initramfs> prompt now?
07:37
ltsp_fan: btw you don't need ipxe now
07:37
<ltsp_fan>
the last few lines: /scripts/init-bottom ... server not responding, still trying
07:37
<alkisg>
Your kernel does get downloaded
07:38
ltsp_fan: try adding break=mount in the place where quiet was
07:38
You're supposed to get an initramfs prompt there
07:38
And then you can change mtu etc because it's probably a problem with the network
07:39
(or, if it's a desktop pc, you can try another nic...)
07:41
<ltsp_fan>
added break mount
07:42
"/bin/sh" can't access tty but I do get a initramfs prompt
07:42
i don't know much about mtu
07:42
<alkisg>
!mtu
07:42
<ltsp`>
Error: "mtu" is not a valid command.
07:42
<alkisg>
Can you try another NIC?
07:43
<ltsp_fan>
other desktop clients do indeed work
07:43
<alkisg>
What nic is that one?
07:43
Also, check the output of `ifconfig`
07:43
<ltsp_fan>
Sis
07:43
<alkisg>
OK, run this:
07:44
ifconfig eth0 mtu 1492
07:44
exit
07:44
And see if it boots
07:44
(type those in the break=mount prompt)
07:45
<ltsp_fan>
you mean in the initramfs prompt
07:45
<alkisg>
Yes
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07:51
<alkisg>
ltsp_fan: did it boot with mtu=1492?
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07:54
<ltsp_fan>
sorry working on it
07:55
once you type in the command, how do you boot?
07:56
<alkisg>
With the exit command
07:56
It means "ok I'm done with the break=mount prompt, continue booting"
07:57
<ltsp_fan>
IT WORKS!
07:57
wow
07:57
so what did we do?
07:57
<alkisg>
!sis191
07:57
<ltsp`>
I do not know about 'sis191', but I do know about these similar topics: 'sis190'
07:58
<alkisg>
!sis190
07:58
<ltsp`>
sis190: In some kernels, the sis190 module has problems with NBD/NFS so the clients stop at iniramfs>. To fix them put this http://paste.debian.net/65403/ in $CHROOT/usr/share/initramfs-tools/scripts/init-premount/udhcp-sis190, chmod +x it, and run update-initramfs -u in the chroot and ltsp-update-kernels outside of it
07:58
<alkisg>
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/345374
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07:59
<ltsp_fan>
how did you know I have a sis191 card?
08:00
<alkisg>
You said it was sis, I don't know if it's 191 or 190
08:00
It shouldn't matter though
08:00
<ltsp_fan>
no, I'm just blown away by your detective skills in general :)
08:01
did you know about the sis problem off the top of your head?
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08:01
<alkisg>
Haha, well modesty aside, I did get a lot of experience while supporting 1000+ schools here... http://www.ltsp.org/stories/widget-map/?location=Greece
08:01
<ltsp_fan>
wow!
08:02
<alkisg>
The 2 things you said about nfs in tftp + hanging, pointed me to an initramfs problem
08:02
And there are only a handful of problems that make initramfs hang without a prompt...
08:02
<ltsp_fan>
so then let me ask how did you solve the problem the first time you encountered it?
08:03
<alkisg>
Well from break=mount I tried "nfsmount xxx" and it hanged
08:03
But ping etc worked
08:03
<ltsp_fan>
why I'm asking is because I've always wondered how people from basic competence to real expertise, is mentorship, like you have been giving me, the secret?
08:03
<alkisg>
I don't remember which google keywords made me thing about changing mtu
08:04
Wait wait you can't get from competence to expertise without studying CS first...
08:04
<ltsp_fan>
how people *progress* from ...
08:04
<alkisg>
I do have 12 years of studying
08:04
(college studies, that is...)
08:04
<ltsp_fan>
I have studied CS
08:05
<alkisg>
OK, then it's just a matter of continuous reading, troubleshooting etc
08:05
E.g. at some point when troubleshooting an ipconfig bug, I had to spend a week reading the dhcp protocol, and messing with the ipconfig sources, compiling etc
08:05
There's no magic involved, just hard work...
08:06
<ltsp_fan>
but yet somehow there is a method to your reading that enables your learning to progress
08:06
maybe its confidence in your self (once you have the basics and the studies)
08:07
<alkisg>
Each person absorbs what he reads in a different way... I invested a lot of time while growning up to "learn how to learn better"...
08:07
When I came here in #ltsp in 2008, for 3 years I was declaring outright that I was a linux noob
08:07
<ltsp_fan>
yes that's what I mean, could you elaborate, please
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08:08
<alkisg>
That would be way out of topic... I'm also a teacher btw and have studied a lot about learning techniques, but it's not something you can easily describe in a small irc chat, and in a foreign language...
08:08
<ltsp_fan>
you're like a universal turing-learning machine, what in your opinion is the most important aspect of that independence
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08:09
<ltsp_fan>
your english is very good, btw. how about a link?
08:09
<alkisg>
Link? Meaning?
08:09
<ltsp_fan>
website that captures your philosophy on learning how to learn...
08:09
<alkisg>
I don't think I ever wrote online about that, sorry :)
08:10
And with all those modern learning techniques, I never read about some theory mentioning it the way I mean it either...
08:10
<ltsp_fan>
in my learning i've started to appreciate the importance of a mentor to accelerate the learning... but you seem to be able to learn on your own
08:11
ahhh, so besides transforming Greece education, i think you should write about book about learning how to learn :)
08:11
<alkisg>
There are some times where a mentor is extremely helpful, but the best students usually make their own pace, and only ask for guidance on specific points
08:11
Hahaha
08:13
<ltsp_fan>
Do you hang around here often?
08:13
can i try implement the permanent part and get back to you
08:13
also i have another question about ipxe
08:14* alkisg hangs around often, but needs to go right now.. bb!
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08:16
<ltsp_fan>
Thanks for all the help, it's been wonderful!
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09:17
<ltsp_fan>
Some feedback, for those following
09:18
I followed the !sis190 advice
09:18
it didn't work :(
09:18
I then tried to troubleshoot
09:18
i eventually commented out: for f in /run/net-*.conf; do . "$f" done
09:18
and now it works!
09:19
I'm not sure if what I commented out is important?
09:27
But I'm happy. A big thank you to alkisg
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11:47
<Guest90650>
Hi all. I have the problem described in bug 1021579. Does anybody know how to fix it in Ububtu 14.04 Trusty?
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11:56
<work_alkisg>
Guest90650: ping stgraber to backport the fix to trusty, or use the packages from vivid: http://packages.ubuntu.com/search?keywords=ltspfs
11:57
<Guest90650>
work_alkisg: thanks for that. I am going to try the vivid packages.
11:58
work_alkisg: Do I need both the ltspfs and ltspfsd packages? Or can I just install the ltspfs package on the server?
11:59
<work_alkisg>
I think you need both
11:59
ltspfsd in chroot, ltspfs in server
12:00
<Guest90650>
OK - thanks for that. Here goes.....
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12:19
<charles__>
work_alkisg: Hi - this is <Guest90650> back as a diferent user. The Vivid packages worked very nicely.
12:19
<work_alkisg>
Cool :)
12:19
<charles__>
Thank you for your help.
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12:19
<work_alkisg>
You're welcome
12:20
(I also solved the bug :D)
12:20
i.e. the partition size issue itself...
12:20* work_alkisg isn't using ltspfs at all though, only pure thin or pure fat clients
12:21
<charles__>
Fantastic. I had the problem on a 12.04 system. Fixed it then by compiling an old ltspfs
12:22
This is a new system, so I just checked whether it was still a problem. Need to fix it because it would be a major issue if a user hit it when I'm not here.
12:24
work_alkisg: thanks again for your help. I have always found this IRC channel friendly and helpful - as opposed to others I could mention.
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17:11
<ltsp_fan>
greetings
17:14
how do install ipxe to a client's harddrive? I've git-cloned, make'd ipxe.usb and installed it to a usb successfully. but now I want to burn that image to the hard-drive with no success
17:14
i've tried to make ipxe.dsk and dd'd that to the hard-drive but that didn't work
17:17
<championofcyrod1>
ltsp_fan, likely you want to create a partition formatted with FAT (i think) and push the ipxe.img/iso to that partition. then add a grub entry to boot from it.
17:17
the other option on the ipxe site refers to burning the ipxe ROM to your network card, which is probably a bad idea
17:18
http://packages.ubuntu.com/precise/admin/grub-ipxe
17:19
ah i remember now... you need to put the ipxe kernel on your partition.. then boot that kernel via grub...
17:19
https://releng.archlinux.org/pxeboot/
17:19
in that GRUB 2 example, they have it on the root (/) of partition 1 on disk0
17:19
i think.
17:23
<vagrantc>
on recent versions of debian, "apt-get install ipxe" will add ipxe to your boot menu
17:25
<championofcyrod1>
^nice
17:33
<ltsp_fan>
but i have a blank client disk
17:34
i would like to have a minimal image that I can dd to the hard disk
17:35
should i first install a bare-bones linux distro, then apt-get install ipxe, then keep that image for later use?
17:35
btw I have a custom ipxe.img, I suppose I could just replace the one that apt-get installs?
17:36
<championofcyrod1>
you'll need to make your disk bootable using grub first.
17:36
using a /boot partition
17:36
then, inside grub, add an entry to boot the ipxe.krnl
17:37
<ltsp_fan>
i did try that from a bootable usb (lubuntu 14.04) but I got an error to do with /cow
17:37
the new grub is very confusing
17:38
<championofcyrod1>
https://help.ubuntu.com/community/CreateBootPartitionAfterInstall#Manual_way
17:38
that should walk you through creating the boot partition w/ an ubuntu live cd/usb
17:39
(on the client disk)
17:40
<ltsp_fan>
cool, let me try that. Thanks guys!
17:40
<championofcyrod1>
then, when doing the grub2 setup, create an entry like the pxeboot link from archlinux in the link above..
17:40
pointing to ipxe kernel
17:40
then you should be able to boot into grub, then load the ipxe kernel.
17:41
<ltsp_fan>
should I just stick to grub legacy?
17:42
<championofcyrod1>
you can use legacy or grub 2
17:42
there are ipxe menu entries for both
17:43
<ltsp_fan>
great, thanks!
17:43
I plan to give feedback tomorrow hopefully
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17:48
<vagrantc>
!ipxe
17:48
<ltsp`>
ipxe: iPXE is the successor to the etherboot/gPXE project, and can be used to netboot clients that don't have a NIC ROM with a PXE stack. To add it to grub, see !grub-ipxe. To add it to the Windows boot loader, see !win32-loader. To download floppy, CD or USB images, visit http://ipxe.org or install the ipxe package.
17:48
<vagrantc>
!grub-ipxe
17:48
<ltsp`>
grub-ipxe: http://packages.ubuntu.com/grub-ipxe can be used to add a "Boot from network" option to grub2.
17:49* vagrantc wonders if the usb images can be written directly to hard disk or other media
17:59
<championofcyrod1>
they can.
17:59
using dd
17:59* championofcyrod1 tried it once.
17:59
<championofcyrod1>
maybe that was rEFIt actually.
18:00
meh it should still work... just dd if=/dev/sdb of=/dev/sda (where /dev/sdb is your usb drive)
18:01
of course it will re-write the partition table and your disk will think it's the size of the usb.
18:01
the ipxe usb tool i think does something similar, so your usb thinks its only ~20MB
18:01
dd if=bin/ipxe.usb of=/dev/sdX
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18:16
<muppis>
!local
18:16
<ltsp`>
I do not know about 'local', but I do know about these similar topics: 'install-localapp', 'localdev', 'localapps-print', 'RDP-localdev', 'localapps', 'LocaldevCommonGroupWorkaround', 'localxterm', 'local-disks', 'local-boot'
18:17
<muppis>
!local-boot
18:17
<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
18:19
<muppis>
What I should take care if I want expand image to disk, so it doesn't need to be looped?
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18:29
<vagrantc>
drop the loop argument, dd i386.img to /dev/sda1
18:30
you may need to partition /dev/sda
18:30
but don't do that on your server, of course
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18:33
<muppis>
I'll try that.
18:34
<alkisg_web>
Has anyone tried redirecting the client's SYSLOG recently? Does it work?
18:37
<championofcyrod1>
you mean like, with rsyslog?
18:38
<alkisg_web>
!lts.conf
18:38
<ltsp`>
lts.conf: (#1) http://manpages.ubuntu.com/lts.conf, or (#2) lts.conf manpage is available in the ltsp-docs package
18:38
<alkisg_web>
The SYSLOG_HOST parameter from there
18:40
<vagrantc>
haven't tried recently...
18:40
<championofcyrod1>
oh. Mine is likely using the default 'server'
18:41
want me to check the server logs for client syslogging?
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18:42
<championofcyrod1>
"You have to configure your server to accept remote logging as well."
18:42
i didnt do that part ^
18:42
so likely i'm not getting any logs from the clients
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18:42* alkisg_web is re-reading https://bugs.launchpad.net/ubuntu/+source/ltsp/+bug/697387 ...
18:43
<alkisg_web>
championofcyrod1: no, if you haven't configured the server it won't work
18:43
But if you do want to test it for yourself, sure, I'd appreciate the feedback
18:43
Don't bother testing just for me though, I'll do it tomorrow at work...
18:44
<championofcyrod1>
just finished resolving a 3-4 day long bug in my openstack cluster... getting lunch and i'll test for you when i get back, in about 30-45 mins.
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18:49
<alkisg_web>
Thanks, if I'm gone I'll read the irclogs,
18:49
btw these server-side instructions might work: http://wiki.ltsp.org/wiki/Troubleshooting
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18:53
<alkisg_web>
Hmm no those aren't for rsyslog, they're for syslog-ng
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19:07
<muppis>
Best in Finland: Sauna and snow. Espescially when those two are combined.
19:10
<Hyperbyt2>
Combined? You can't bring snow into a sauna. It'll melt.
19:12
<muppis>
Of course not to sauna. Directly from sauna to outside to snow taking a bath and then back to sauna.
19:16
It's really refreshing.
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19:32
<syrius>
hmm, just did an upgrade of some packages on my ltsp server... using virtualbox to test the PXE login and get this message: http://i.imgur.com/ejL5bfp.png - though the other 'dumb' terminals in the office seem to login fine
19:32
except i don't think they rebooted, and will probably experience this when they do
19:33
in my config.default i have 'AOEROOT=/dev/etherd/e0.1', but didn't re-run the "vbladed 0 1 eth1 /srv/kiwi-ltsp/i386.img" upon restarting the system
19:34
ah that was it.. hmm, what's the best way to have it do that on a restart?
19:37
<vagrantc>
restart of what?
19:37
<syrius>
system restart
19:38
/etc/init.d/after.local?
19:39* vagrantc would think the relevent AOE packages should include some init mechanism
19:39
<vagrantc>
but i don't know opensuse
19:39
<syrius>
well that was one of the problems last time cyberorg was helping me
19:40
that one night (still thanking you guys for that)
19:40
my notes show that rckla didn't start vblade automatically
19:40
and i hadn't restarted this system since that night, so i just ran into it. revisited my notes though
19:41
i think i'm good for now. it's theoretically where it was at before
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21:36
<needsquickhelp>
What's the current version of LTSP?
21:37
<vagrantc>
https://bazaar.launchpad.net/~ltsp-upstream/ltsp/ltsp-trunk/view/head:/release.conf
21:37
looks like 5.5.4
21:38
<needsquickhelp>
Thank you
21:38
<vagrantc>
though there are many other components
21:39
and it varies widely by distro
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22:03
<championofcyrod1>
meh, as usualy i need more than 24 hours in a day... I looked briefly at the rsyslog configs for by LTSP fat client and did not see anything that indicated remote logging to $SERVER.
22:03
will look in more detail tomorrow.
22:03
however, i DO have rsyslog working w/ the ltsp server in my custom centos environment.
22:04
but that was just manually configuring the chroot's rsyslogd as well as the server using TCP instead of UDP.
22:04
(might be using tcp, can't remember exactly at the moment.)
22:05
Off to my weekly Billiards League Monday night match. Hope I win harder at that than I am at this.
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