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


Channel log from 4 September 2015   (all times are UTC)

00:05
<dgroos>
hmmm… I just checked /etc/hosts and see a couple of lines there, but wonder if they are being used. I think they were put there by the AD binding program. I think that /etc/hosts isn’t used when you use network manager?
00:07
<maldridge>
/etc/hosts is used by resolvconf
00:08
you probably have the base set that's used to resolve the machine itself
00:08
<dgroos>
there’s the 127.0.0.1 localhost
00:09
<maldridge>
yeah, that's needed to actually resolve the machine itself
00:09
<dgroos>
but there’s also 127.0.1.1 computername.domain.name.of.the.ADserver
00:10
<maldridge>
yeah, that's needed to make sure that the fqdn resolves
00:11
<dgroos>
OK, thanks for that check, too.
00:11
<maldridge>
np
00:18
<dgroos>
So, I just tried to log in with my admin account on a client, and it doesn’t work. I can only log in with a user from the AD domain. I did unjoin my server from the AD domain, but still couldn’t log in. That’s really strange…
00:19
I had assumed that I could do that, that the only problem was with the student accounts on the remote AD.
00:21
<maldridge>
did powerbroker override changes in nsswitch?
00:21
<dgroos>
How tell?
00:21
<maldridge>
you'd need to look in both your name service config, as well as /etc/pam.d
00:22
I'd stay and help, but I have to go attend an ACM kickoff event in 5 minutes. Good luck and I'm sure there are others in the channel that can help with this portion.
00:22
<dgroos>
Thanks!
00:23
I should head home too. Have a good one.
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05:19
<url>
hi all
05:19
didn't realize there was an IRC :'(
05:19
i've been struggling with what I assume is a relatively straightforward issue
05:20
I'm running pinet on ubuntu but the thin clients can't see the printer
05:20
i haven't pulled out all of my hair yet, but.... i'd appreciate any pointers
05:21
I've looked: help.ubuntu.com/community/UbuntuLTSP/localprinter
05:21
and a few similar pages, but so far no dice
05:42
<quinox>
I can't help you, but stick around and you'll be served
06:04
<maldridge>
url: can't see the printer, or can't print to it
06:09
<url>
actually couldn't log into cups on the thin client
06:09
i just added root (poor form i know) to the lpadmin group in chroot, so i'm hoping that will help
06:09
i've just done the update-image, but i'm working remotely so i'm waiting on the guy to load an SD card for me
06:10
<maldridge>
ah, good luck with it; its 0100 here so I think I'll be off for the night
06:10
<url>
haha, no worries, thanks anyways
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07:24
<bobptz>
alkisg
07:24
με πέταξε έξω
07:24
<alkisg>
!greek
07:24
<ltsp`>
greek: Στο παρόν κανάλι μιλάνε μόνο Αγγλικά, για υποστήριξη στα Ελληνικά από την υπηρεσία Τεχνικής Στήριξης ΣΕΠΕΗΥ διαβάστε το http://ts.sch.gr/wiki/IRC και στη συνέχεια πληκτρολογήστε /j #ts.sch.gr
07:25
<alkisg>
bobptz, είσαι σε λάθος κανάλι, είσαι στο #ltsp αντί του #ts.sch.gr
07:25
<bobptz>
I know, but the system connected me here twice
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08:45
<alkisg>
Hyperbyte: the first problem was that debian ships an ifup@.service, which unconditionally runs `ifdown -a`, i.e. brings down even interfaces that are required for root, for network swap etc
08:45
That's a regression from the previous implementation in init.d/networking, which properly checked for a network root/swap
08:46
By overriding the ifup@'s ExecStop= directive, that part of the problem is solved
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12:07
<TvR_>
any ideas, why nbi.img is not created any more (debian jessie amd64) ?
12:09
<alkisg>
TvR_: it hasn't been working since 5+ years
12:09
<TvR_>
alright
12:09
<alkisg>
mkelfimage or something related was broken and the .nbi images were not bootable
12:09
You can manually install mkelfimage and have the .nbi images generated, although they still won't be bootable
12:10
<TvR_>
then its something else... I tried to build jessie image for LTSP running wheezy - while wheezy image works, jessie clients have "file not found " error on startup
12:11
pxelinux.0 is served by tftp (checked with tftp client)
12:11
<alkisg>
Check your tftp server logs, or /var/lib/tftpboot/ltsp/i386/
12:11
<TvR_>
pxelinux.0 is quite downloadable with tftp client
12:12
<alkisg>
sure, but you'll see exactly which file isn't
12:12
<TvR_>
as it resides on both /srv/tftp/ltsp/i386 and /var/lib/tftboot/ltsp/i386
12:12
<alkisg>
(e.g. the kernel, or pxelinux.cfg/default)
12:12
It's not only that one file
12:12
There are others downloaded via tftp
12:13
<TvR_>
yep. all are there and can be downloaded with tftp client
12:13
<alkisg>
Will it hurt you to check syslog which will tell you the exact file? :)
12:13
<TvR_>
also, when I put wheezy image back and run ltsp-update-kernels, everything works again
12:13
nothing in syslog
12:14
<alkisg>
which tftp server are you using?
12:14
<TvR_>
tftpd-hpa
12:14
<alkisg>
Enable verbose in /etc/default/tftpd-hpa, and restart it
12:14
then check syslog again
12:14
<TvR_>
thanks, will try
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12:37
<dgroos>
Trying to troubleshoot a series of probs with ltsp-pnp fat clients.
12:37
Most basic problem, perhaps, is that when I put laptop on internal LAN it doesn’t pick up an IP. Yet, clients are still able to boot.
12:39
Another strange issue: Admin account (from server) can not log into a client, but people in the connected AD domain (via PowerBroker-open—which is the re-branded Likewise-opent), can.
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12:41
<dgroos>
Finally, the least of the problems is that every time I reboot the computer I just re-do the series of commands to deal with the DNS issue as per the ltsp-pnp page: https://help.ubuntu.com/community/UbuntuLTSP/ltsp-pnp
12:43
Oh, and I should mention that I have to add the districts dns address to: /etc/resolvconf/resolv.conf.d/head so that I can run powerbroker (the AD domain-binding software).
12:43
Anyone have an idea where to start??? :-)
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12:48
<hxs>
Hello all. I am trying to use epoptes for monitoring our digital signs. I have installed epoptes on my machine and epoptes-client on the client machine. When I run epoptes-client on the client machine it says it is connecting to my machine ip:789, however on my machine I never see any detected clients. I have followed the instructions from this site:http://www.2daygeek.com/manage-and-monitor-your-office-pc-with-epoptes-in-linux-mint-debian-
12:53
<vmlintu>
dgroos: do you use AD for anything else than logins?
12:54
<dgroos>
vmlintu: no only authentication for logging in.
12:54
<vmlintu>
dgroos: do you have the users created locally?
12:57
<dgroos>
When I check /etc/passwd/ I only see users created locally (just 2 users in addition to all the system users), yet when I’m at the login screen, I see everyone who has actually logged in to the system via local or via AD binding—maybe 40 users.
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12:58
<dgroos>
All the AD logged-in users have home folders now in /home/local/DomainName/
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13:07
<vmlintu>
dgroos: are you using ldm or lightdm on the login screen?
13:07
<dgroos>
?
13:08
don’t know what these are. how do i find out?
13:08
<vmlintu>
You see a list of AD users on login screen and you can select the user?
13:09
<dgroos>
yes
13:10
<vmlintu>
Does the login screen look different from normal ltsp?
13:10
Are the home directories on the client or on the server?
13:11
<dgroos>
Sorry, I don’t remember for sure about the login screens, I think I’ve seen this before.
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13:12
<dgroos>
Home dirs on on server—clients don’t have hard drives.
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13:14
<vmlintu>
The Admin account not being able to login to clients sounds like some nss/pam issue, but I've never seen PowerBroker or Likewise..
13:14
I've always done AD authentication with normal kerberos/ldap tools..
13:14
<dgroos>
I’ve used likewise since 2011 and been very happy with it.
13:15
I’m wondering if I should try that and remove PB.
13:15
<vmlintu>
If you are not familiar with kerberos insides, I don't recommend doing it..
13:16
<dgroos>
I’m not :-)
13:16
We don’t use kerberos, just AD.
13:16
<vmlintu>
AD uses kerberos
13:16
<dgroos>
Ahh…
13:17
<vmlintu>
These tools are sometimes too clever and modify the system in ways that break some other usecases
13:18
The DNS issues sound separate from this
13:21
<dgroos>
OK, starting there, why would I need to add something specifically to /etc/resolvconf/resolv.conf.d/head. Maybe I’ll turn PBIS off and try to get the client system to work with just local users, then add on powerbroker. One question,
13:22
Why would I keep having to re-apply the DNS solution on alkisg’s ltsp-pnp page upon each re-boot to solve the dns problem?
13:22
Is there something strange w/my setup?
13:25
<vmlintu>
The changes you've done to the image on the server are lost on clients?
13:26
<dgroos>
I mean that when I reboot, unless I reapply the commands starting with: sudo -i
13:26
sed 's/^dns=dnsmasq/# Commented by ltsp-pnp: dns=dnsmasq/' \ …
13:27
the clients will not be able to boot.
13:30
and if I try to boot a client I get tons of these:
13:30
Sep 3 17:07:59 southsci1 in.tftpd[4251]: /tftpboot: No such file or directory
13:30
Sep 3 17:08:00 southsci1 in.tftpd[4252]: connect from 192.168.67.195 (192.168.67.195)
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13:44
<vagrantc>
my wild hunch is you're not getting a DHCP response configured for LTSP
13:44
"Sep 3 17:07:59 southsci1 in.tftpd[4251]: /tftpboot: No such file or directory" suggests it's trying to load from a hard-coded tftp location ... maybe.
13:45
and lightdm vs. ldm ... you'll get LDM by default unless you've gone out of your way to disable it
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13:50
<dgroos>
vmlintu: OK: disconnected from AD. Removed nameserver info from: /etc/resolvconf/resolv.conf.d/head and rebooted server.
13:50
Hooked laptop to internal network and sure enough it did pick up an internal IP from the server’s DHCP.
13:51
However, I was not able to ping 8.8.8.8 from this laptop.
13:51
I then applied the sed 's/^dns=dnsmasq/# Commented by ltsp-pnp: dns=dnsmasq/' \ … commands, but still unable to ping out.
14:00
<vmlintu>
do you have one or two nics?
14:01
<dgroos>
2 nics and have commented out the proxy setting.
14:01
<vmlintu>
you have a nat configured?
14:04
<dgroos>
No. am using network manager as per https://help.ubuntu.com/community/UbuntuLTSP/StaticIP but, not seeing the check box for “Available to all users” which I figure did the auto set-up of NATting
14:04
I think 14.04 doesn’t have this checkbox in nm anymore.
14:05
<vagrantc>
!network-manager
14:05
<ltsp`>
Error: "network-manager" is not a valid command.
14:05
<vagrantc>
!nm
14:05
<ltsp`>
Error: "nm" is not a valid command.
14:05
<vagrantc>
oh well.
14:05
<vmlintu>
available to all users doesn't do nat, I think.. It just shares the configuration to others
14:06
<dgroos>
OK.
14:07
Oops, just saw the time, students arrive in 2 minutes… Need to adjust my high school science teacher hat ;-)
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14:07
<dgroos>
Will try NATting during lunch break. Any recommendations for a good page on that? I think https://help.ubuntu.com/community/UbuntuLTSP/ThinClientHowtoNAT
14:08
won’t work for me since ltsp-pnp uses dnsmasq, right?
14:10
bye and thanks so much for your help vmlintu !
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14:59
<alkisg>
!sch-scripts
14:59
<ltsp`>
Error: "sch-scripts" is not a valid command.
14:59
<alkisg>
!nat
14:59
<ltsp`>
nat: To set up NAT on your LTSP server, see: https://help.ubuntu.com/community/UbuntuLTSP/ThinClientHowtoNAT
15:01
<alkisg>
!forget nat
15:01
<ltsp`>
The operation succeeded.
15:01
<alkisg>
!learn nat as To set up NAT in your LTSP server, set its internal IP to 192.168.67.1 and put http://bazaar.launchpad.net/~ts.sch.gr/sch-scripts/trunk/view/head:/debian/sch-scripts.if-up to /etc/network/if-up.d/sch-scripts
15:01
<ltsp`>
The operation succeeded.
15:01
<alkisg>
dgroos: ^
15:01
!forget nat
15:01
<ltsp`>
The operation succeeded.
15:02
<alkisg>
!learn nat as To set up NAT in your LTSP server, set its internal IP to 192.168.67.1 and put http://bazaar.launchpad.net/~ts.sch.gr/sch-scripts/trunk/view/head:/debian/sch-scripts.if-up to /etc/network/if-up.d/sch-scripts. This also takes care of flow-control issues, possibly increasing your network speed 10 times. :)
15:02
<ltsp`>
The operation succeeded.
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15:51
<dgroos>
!thanks alkisg!
15:51
<ltsp`>
Error: "thanks" is not a valid command.
15:51
<dgroos>
should be…
15:52
alkisg: I don’t have /etc/network/if-up.d/sch-scripts/ should I?
16:15
still trying to figure out why, after reboot, I have to re-apply the dns solutions on https://help.ubuntu.com/community/UbuntuLTSP/ltsp-pnp
16:22
<alkisg>
dgroos: /etc/network/if-up.d/sch-scripts is where you will put that script, it's not a directory, it's the script name
16:24
<dgroos>
? if I put the script in /etc/network/if-up.d/sch-scripts doesn’t that make sch-scripts a directory in /etc/network/if-up.d/? I’m not trying to nit-pick, just trying to understand.
16:27
back in an hour…
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16:33
<alkisg_web>
dgroos: you're supposed to download http://bazaar.launchpad.net/~ts.sch.gr/sch-scripts/trunk/view/head:/debian/sch-scripts.if-up
16:33
then rename sch-scripts.if-up to sch-scripts without an extension
16:33
then put that file to /etc/network/if-up.d/
16:33
and run chmod +x /etc/network/if-up.d/sch-scripst
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16:47
<trevorphillipdav>
hello ... have a question, can we publish just applicstions with LTSP?
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17:03
<Junior>
afternoon. Its possible to send shortcuts via epoptes ? lets say alt+space+x ?
17:04
<alkisg>
Junior: you can run a utility to send keystrokes with epoptes
17:05
xautomate etc
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17:08
<Junior>
i need to run it on clients or in the server ?
17:10
<alkisg>
From the execute command of the epoptes gui
17:10
xautomate needs to be installed in the clients
17:11
<Junior>
great ill check
17:11
ty
17:12
<alkisg>
you're welcome
17:13
Junior: xautomation, not xautomate... the command you need is manpages.ubuntu.com/xte
17:19
<Junior>
yesterday i was with a problem on epoptes with 2 clients started with a red monitor on the server screen
17:19
today its all good
17:28
and now crashed again
17:28
:p
17:32
<alkisg>
Junior: what crashed, epoptes?
17:32
Do file a bug report with the apport output
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17:32
<Junior>
the client now appears as a red monitor and i cant see the screen
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17:54
<dgroos>
work_alkisg: I believe I did as directed and get: ls -la /etc/network/if-up.d/ | grep sch
17:54
-rwxr-xr-x 1 root root 2424 Sep 4 12:32 sch-scripts.if-up
17:54
rebooted server, reapplied the commands for the DNS error as shown on the ltsp-pnp page.
17:56
Tried to log in on a client as admin and a session did not start—I was just returned to the login screen.
17:56
and… got to go back to teaching, back in 2 hours…
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20:21
<dgroos>
looks like re-install time…
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22:52
<dgroos>
re-installed 14.04.3, re-installed ltsp-pnp, and also added the improved ltsp-image-update files plus the bonus file: /etc/network/if-up.d/sch-scripts.
22:52
I’ve done nothing else to the fresh install.
22:54
The client boots! I can log in to the client with my admin account, I can ping 8.8.8.8, but can’t ping google.com. Therefore I figure a dns problem…
22:55
So, to check I put my laptop on the internal network, it did gain an 192.168.67.x ip AND was able to ping 8.8.8.8 AND was able to ping google.com. So, I figure dns info IS passing through on my 2 NIC server.
22:56
How can DNS info be passed through from the internal AND the client not be able to get DNS service to ping google.com? Any ideas?
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23:22
<dgroos>
added district’s dns server to /etc/resolvconf/resolv.conf.d/head on the server, restarted network and dns, re-built image and client boots, admin account logs in, and from client can ping google.com :-)