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


Channel log from 9 May 2017   (all times are UTC)

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06:22
<yashpal>
how i will install ltsp server with fedora
06:23
<alkisg>
Fedora hasn't supported LTSP for 5 years or so
06:23
So better use a deb-based distribution like Ubuntu or Debian
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06:55
<ZAJDAN>
alkisg: hi....this is something 'remarkably'...that LTSP is not on some "big" distro as is RedHat, CentOS...usually such distros are used in corporate area
06:56
<alkisg>
ZAJDAN: redhat maintains gnome and a lot of key compontents
06:56
But there are 50.000 packages
06:56
<ZAJDAN>
and where else is the better place for LTSP than corporate area
06:56
<alkisg>
So, *most* of them are maintained by independed developers in whatever distro they prefer
06:57
I prefer Ubuntu, so I maintain LTSP on Ubuntu. It seems that no LTSP developer is using Fedora.
06:57
<ZAJDAN>
paradox..I personaly use LTSP for 4 stations :_) but why not :_)
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07:23
<Trendzetter>
goodmorning LTSP
07:23
<question1000>
alkisg: ok, back again ... finally online in the classroom
07:24
not toooo much time now ... but I will be back at 11h
07:25
maybe you're here then...
07:28
<Trendzetter>
I am using a LTSP-pnp to show a chrome kiosk. I was suggested to use marco window manager to correct the resolution of the screen.
07:29
When I run marco from a xinit script I get a pointer on screen with correct resolution.
07:30
But if I run chrome afterwards it is not displayed. I only get a pointer no windows.
07:31
<alkisg>
question1000: 11h => in which time zone? :)
07:32
Trendzetter: you need to run marco & to put it in the background
07:37
<question1000>
alkisg: germany here :)
07:39
<alkisg>
question1000: ok, when you can, run vnc
07:39
!vnc-edide
07:39
<ltsp>
vnc-edide: To share your screen with me, open Epoptes → Help menu → Remote support → Host: srv1-dide.ioa.sch.gr, and click the Connect button
07:41
<Trendzetter>
@alkisg: It works exactly as it should now! :D
07:41
<alkisg>
Trendzetter: cool
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10:41
<question1000>
alkisg: ok. back
10:41
late, but back...
10:41
finally
10:43
alkisg: still there?
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11:06
<question1000>
ok, we missed.... will try it again tomorrow. bye
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15:33
<SYS64738>
hi
15:34
<alkisg>
Hello
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15:38
<SYS64738>
where can i find info about disable the shutdown button of the window manager for the clients ?
15:39
I found users to input the admin when the system ask for the admin password
15:39
(admin password)
15:40
<alkisg>
Which distro/version/desktop environment are you using?
15:42
<SYS64738>
xfce4
15:44
ubuntu 16.04.2 / xfce4
15:46
<alkisg>
You should ask at #xfce or #xubuntu, then... other desktop environments work fine
15:48
<SYS64738>
ok thanks
15:50
alkisg: wich distro are you using on ltsp enviroments ?
15:50
<alkisg>
Ubuntu mate
16:01
SYS64738: also have a look at using ltsp fat clients, instead of thin
16:01
!fatclients
16:01
<ltsp>
fatclients: Nowadays LTSP supports thin and fat clients. They are both diskless and netbooted from the same LTSP chroot, but while thin clients run the session on the server and transfer the screen, fat clients run the session locally with their own CPU/RAM, thus performing amazingly better. See also !ltsp-pnp and https://help.ubuntu.com/community/UbuntuLTSP/FatClients
16:01
<alkisg>
!ltsp-pnp
16:01
<ltsp>
ltsp-pnp: ltsp-pnp is an alternative (upstream) method to maintain LTSP installations for thin and fat clients that doesn't involve chroots: https://help.ubuntu.com/community/UbuntuLTSP/ltsp-pnp
16:01
<alkisg>
That ^ tutorial is the best way to install ltsp nowadays
16:02
<SYS64738>
thanks
16:02
indeed I have fat client hw
16:02
thanks
16:03
I think the problem for fatclients is my old servers
16:04
<alkisg>
SYS64738: then follow that last wiki page, it should take you only 1 hour to install the os and ltsp
16:05
For fat clients, any server with 1-2 gb ram should be fine
16:05
<SYS64738>
are fat clients enviroments easier for servers than thin ?
16:05
lighter
16:05
<alkisg>
A whooole lot lightter
16:06
<SYS64738>
cool
16:06
thank you very much
16:06
<alkisg>
np
16:06
<SYS64738>
I am really interested in this
16:06
<alkisg>
You can still use xfce in that case, as the shutdown button will then just work locally
16:06
<SYS64738>
I am reading about the kiok mode for xfce
16:06
kiosk
16:07
<alkisg>
Eh, are you following the blog of some user?
16:07
Which tutorial are you reading?
16:07
<SYS64738>
however I am curious and I'll try to restart from your link above
16:07
https://wiki.xfce.org/howto/kiosk_mode
16:08
what's the meaning for ltsp-pnp?
16:08
<alkisg>
Ah, some lockdown setting of xfce? other DEs have those too...
16:09
ltsp-pnp makes it easier to maintain the server as it doesn't have a chroot
16:09
Read the wiki page, it has details there
16:09
<SYS64738>
ok
16:09
<alkisg>
That's the recommented method nowadays
16:09
<SYS64738>
the ltsp docs are very jungled
16:09
never find that page
16:11
epoptes is it a greek word ?
16:11
<alkisg>
Yes
16:12
!epoptes
16:12
<ltsp>
epoptes: Epoptes is a computer lab administration and monitoring tool. It works on Ubuntu and Debian based labs with LTSP or non-LTSP servers, thin and fat clients, standalone workstations, NX clients etc. More info: http://www.epoptes.org
16:12
<alkisg>
Install that one too, it helps
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16:13
<SYS64738>
Zeus Epoptes
16:13
cool
16:13
time go now, thanks again man!
16:14
<alkisg>
np
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17:16
<xKill>
hi everybody, I'm having some problems with ltsp on ubuntu mate 16.04. Clients run good but sometimes they hang for a while, from 20 secs to a minute, then continue working without problems. This happens randomly
17:17
i have other ltsp (older ubuntu 10.10) and this dont happens to them
17:31
<alkisg>
xKill: do you see any weird messages in the output of `dmesg`?
17:31
Both on the server and the clients?
17:32
<xKill>
let me check
17:33
<alkisg>
For example, if on the server you see "link is down", that means network disconnected, thus the clients would hang...
17:39
<xKill>
nop, nothing weird
17:50
<alkisg>
put the client dmesg and syslog to pastebin
17:54
<xKill>
ok
18:00
dmesg
18:00
https://pastebin.com/XGLz5j2h
18:01
syslog
18:01
https://pastebin.com/4eT9CYzr
18:02
those are from ltsp client (thin client)
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18:14
<alkisg>
xKill: are you using nfs?
18:14
and, ext4 on the client?
18:14
Maybe those are from the server...
18:18
localxterm | echo xKill:
18:19
!localxterm | echo xKill:
18:19
<ltsp>
xKill: localxterm: Any applications that you launch on a thin client actually runs on the server, not on the client itself. If you want to open a program on the client locally, you can type 'ltsp-localapps <program>' in a run dialog or in a terminal. For example, 'ltsp-localapps xterm' to open a terminal running on the client.
18:19
<alkisg>
Run dmesg on a local xterm on the client, not on the thin client session which runs on the server...
18:19
<xKill>
nono
18:19
I ran dmesg locally on the client
18:20
<alkisg>
[    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.4.0-75-generic root=UUID=7975c69b-afef-46c3-8073-e0180a62c46c ro priority=low quiet splash
18:20
That's not a kernel command line for thin clients
18:20
<xKill>
on client's tty
18:20
<alkisg>
It's the server dmesg
18:20
The client command line is root=/dev/nbd0 etc
18:20
<xKill>
i just went to a client pressed ctrl+alt+f1, then login
18:20
and run dmesg
18:21
that's on the client side i think
18:21
<alkisg>
If you were able to login with alt+ctrl+f1, you have something really broken :)
18:21
<xKill>
i've enabled it on purpose
18:21
<alkisg>
How?
18:21
Thin clients don't have users so you can't login localy
18:21
(in the chroot, there are no users defined)
18:21
<xKill>
i've enabled root on the client
18:22
on chroot
18:22
<alkisg>
Look, if you run this: cat /proc/cmdline
18:22
Then you should see root=/dev/nbd0
18:22
If you see root=UUID=7975c69b-afef-46c3-8073-e0180a62c46c ro then it's your server
18:22
<xKill>
lets see
18:22
<alkisg>
Try the localxterm I said above
18:23
<xKill>
i wish you can see what im seeing lol
18:23
<alkisg>
That's what epoptes is for:)
18:23
But you somehow deleted the client?!
18:23
<xKill>
I have a vm that's a thin client
18:23
<alkisg>
!vnc-dide
18:23
<ltsp>
vnc-dide: To share your screen with me, run this: sudo apt-get --yes install x11vnc; x11vnc -connect srv1-dide.ioa.sch.gr - this is a reverse connection, it doesn't need port forwarding etc.
18:24
<alkisg>
Did the vm client ever hang for 30 secs etc?
18:24
<xKill>
it boots like a normal thin client, then I go to its local tty and run commands as root (which I've enabled on chroot by setting a password)
18:24
<alkisg>
Because I don't believe the VM client would have networking issues...
18:24
cat /proc/cpuinfo => see cpu. free => see ram. hostname => see pc name
18:24
<xKill>
ok
18:25
<alkisg>
Those should tell you if it's the client or the server :)
18:25
If the prompt says root@ltsp123, then it's locally on the client..
18:25
<xKill>
1 core xeon
18:25
mi server have 4 cores
18:26
root@PXE-TEST
18:26
that pastebins are from the client man,
18:26
<alkisg>
And cat /proc/cmdline says root=UUIDxxx?
18:26
<xKill>
yes
18:26
<alkisg>
PXE-TEST is what, a hostname you set in lts.conf?
18:26
<xKill>
nono
18:26
wait
18:27
pxe test its the name from dhcp
18:27
<alkisg>
...ok
18:27
What's the output of `cat /proc/mounts | nc termbin.com 9999`
18:27
...on that "client" :)
18:28
<xKill>
cmdline shows
18:28
BOOT_IMAGE=vmlinuz-4.4.0-38-generic ro initrd=initrd.img-4.4.0-38-generic init=/sbin/init-ltsp forcepae root=/dev/nbd0 BOOTIF=01-00-50-56-99-a9-9c
18:28
<alkisg>
Aaah now we're starting to get real feedback :)
18:28
Now run dmesg | grep BOOT_IMAGE
18:28
Does it show the same root=/dev/nbd0 there?
18:28
Because in your pastebin, it didn't
18:28
Because you pasted the server dmesg :)
18:29
<xKill>
[ 0.000000] Kernel command line: BOOT_IMAGE=vmlinuz-4.4.0-38-generic ro initrd=initrd.img-4.4.0-38-generic init=/sbin/init-ltsp forcepae root=/dev/nbd0 BOOTIF=01-00-50-56-99-a9-9c
18:29
<alkisg>
That's what you pasted previously: [    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.4.0-75-generic root=UUID=7975c69b-afef-46c3-8073-e0180a62c46c ro priority=low quiet splash
18:30
See the difference there?
18:30
<xKill>
lets see
18:30
<alkisg>
So the https://pastebin.com/XGLz5j2h that you pasted was the server dmesg
18:30
Now just paste the one from the client...
18:30
dmesg | nc termbin.com 9999
18:31
<xKill>
just did it again
18:31
run dmesg
18:31
to a file
18:31
copy file content
18:31
to pastebin
18:31
https://pastebin.com/h5bRQXNj
18:32
http://termbin.com/wekb
18:38
<alkisg>
xKill: the VM hanged for several seconds?
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18:40
<alkisg>
I don't see anything in the client logs, so it sounds server-side related
18:40
Does it do that with real clients too?
18:44
<xKill>
that happens with real clients
18:45
couldnt replicate it with the vm
18:45
<alkisg>
Right, so it sounds networking related
18:45
<xKill>
the other ltps works fine
18:45
ubuntu 10.10
18:46
<alkisg>
The other ltsp is on the same server?
18:46
<xKill>
I have a esx enviroment so vms move from server to server frequently
18:47
no problems at all
18:50
<alkisg>
Have a `ping` running on the client
18:50
And when it happens ,see if there are lost sequence numbers...
18:50
And one from the server too
18:51
<xKill>
im going to try that, it happens randomly, sometimes it happens 1 time a day, sometimes more
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18:54
<alkisg>
Also note that if the dmesg is from the vm, which hasn't had the issue... then it doesn't help at all...
18:54
You would need a recent dmesg from a client that had the issue
18:55
(and its recent syslog too)
18:55
<xKill>
ill come back tomorrow with a client dmesg and syslog from a real client.
18:56
thanks for your help man
18:56
<alkisg>
np
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