IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 17 February 2021 (all times are UTC)
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| 08:49 | <ltspnewbie> Hi, I am using LightDM and added `LIGHTDM_CONF="user-session=plasma"` to `/etc/ltsp/ltsp.conf` . I want to add another config option, but I can add this line only once, and I can't figure out how I can add several options. Did anyone succeed in that?
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| 09:20 | <alkisg> ltspnewbie: use this:
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| 09:21 | VAR="multi
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| 09:21 | line
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| 09:21 | value"
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| 10:00 | <aza> after "ltsp image /" and booting client I get an error "/ltsp/x86_64/vmlinuz ... No such file or directory" on the LTSP server /srv/ltsp/images/ i am not see vmlinuz ???
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| 10:28 | <alkisg> aza: do you have a separate /boot partition in your image?
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| 10:29 | If so, `man ltsp image`, and read the EXAMPLES section
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| 11:46 | <aza> ok
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| 12:48 | <Peter_Monkberry> Hello all
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| 12:49 | <alkisg> Hello Peter_Monkberry
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| 12:49 | Ah, that's much better than eu_random_number :)
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| 12:51 | <Peter_Monkberry> lol
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| 12:51 | The change you made to dhcp the other day is working great
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| 12:52 | <alkisg> Yey
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| 12:52 | <Peter_Monkberry> I do have a question in that the switch over to pfsense handing out addresses (seems to be the only differing factor), I can no longer use epoptes or command line wakeonlan to start the pcs. Any thoughts?
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| 12:53 | No matter which side of the vlan fence either
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| 12:53 | <alkisg> From what I recall, your ltsp server was handing out address in one side, right?
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| 12:54 | Want me to have a look? I don't recall all the setup details...
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| 12:54 | !vnc-alkisg
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| 12:54 | <ltspbot> vnc-alkisg: To share your screen with me, run this: sudo apt-get --yes install x11vnc; x11vnc -connect alkisg.ltsp.org; this is a reverse connection, it doesn't need port forwarding etc.
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| 12:56 | <Peter_Monkberry> sure I'd love you to have a look
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| 12:56 | the one vlan is using isc-dhcp and the other vlan is using pfsense for the dhcp
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| 12:57 | ok one sec please
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| 12:57 | <alkisg> And you have a single ltsp server where all clients boot from, right?
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| 12:58 | <Peter_Monkberry> yes
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| 13:00 | <alkisg> Peter_Monkberry: now it would help if you could vnc to me, from some client that you do NOT see in epoptes
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| 13:00 | There ARE some clients in epoptes there
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| 13:00 | <Peter_Monkberry> they all show in epoptes once they boot
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| 13:00 | <alkisg> Ah ok. Then the problem is only in send a wol message?
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| 13:00 | <Peter_Monkberry> the problem I'm having is actually starting the pcs from epoptes
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| 13:01 | yes it would seem
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| 13:01 | <alkisg> Let's first try to send a wol in the same subnet
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| 13:01 | Tell me a pc in the same vlanas the ltsp server
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| 13:01 | <Peter_Monkberry> but I also the pcs don't listen if I run wakeonlan as root either
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| 13:01 | each on their own vlan to rule that out
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| 13:01 | ok
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| 13:02 | <alkisg> Epoptes does some magic before shutdown; it tells the systems to listen for wol
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| 13:02 | But if you e.g. power them off by the button, they won't be listening
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| 13:02 | Are the lights on, at the back of their ethernet adapters?
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| 13:02 | <Peter_Monkberry> I'm not there so I don't know about the lights, nor about the power off by button
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| 13:03 | If you think that's a possibility, we can stop this now and I'll verify that later
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| 13:03 | <alkisg> Since you said that "you tried wol in the same vlan", yeah, that's what I think is the most likely issue
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| 13:03 | So let's stop and continue after you test that
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| 13:03 | <Peter_Monkberry> ok sounds good
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| 13:03 | <alkisg> I.e. usual linux shutdown, then wol in the same vlan; and check lights
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| 13:04 | <Peter_Monkberry> thank you!
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| 13:04 | <alkisg> See you!
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| 13:04 | <Peter_Monkberry> ok
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| 14:43 | <sebd_> Hello, how do I set environment variables at LTSP client boot from ltsp.conf ? I tried POST_INIT_PRINTER='export PRINTER=printername' but it does not seem to work
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| 15:00 | <alkisg> sebd_, which process do you want to set that variables to?
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| 15:00 | The users? systemd? pam?
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| 15:01 | <sebd_> the user session, ideally, so that when libreoffice, evince or others try to print they have their own room's printer as default
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| 15:01 | <alkisg> LTSP doesn't manage the user environment
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| 15:01 | Read `man pam_env`, and set variables there
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| 15:01 | <sebd_> ok
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| 15:01 | <alkisg> Some may also go in /etc/environment
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| 15:02 | And, you could provide a session override at e.g. /usr/local/bin/mate, which export the variable, and then exec's /usr/bin/mate"$@"
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| 15:02 | <sebd_> ah yes
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| 15:08 | <alkisg> *mate-session, not mate
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| 15:09 | It's also possible to set the default printer, system-wide, in cups
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| 15:13 | <sebd_> yes but we want it to depend on the physical computer (MAC address), so it should be set from /usr/share/ltsp/client/init/somefile
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| 15:14 | we need PRINTER and PRINTER_LIST
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| 15:16 | I guess something like ENVIRONMENT_somename=somevalue under [client] or [MA:CA:DD:RE:SS] would be useful. It would append these values at the end of /etc/environment or /etc/profile.
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| 15:22 | <alkisg> sebd_: you can have [mac] POST_INIT_SET_PRINTER="sed cups..."
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| 15:22 | That's what ltsp.conf [mac] sections are for, to take effect only on certain macs
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| 15:23 | So you'd end up with a different default printer, system-wide, based on client mac
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| 15:23 | No need for environment variables that way
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| 15:24 | <sebd_> trying [mac]\nPOST_INIT_printer='echo PRINTER=thePrinterQueue >> /etc/environment'
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| 15:25 | (with the right mac of course, I know)
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| 15:25 | <alkisg> There's a chance that /etc/environment doesn't take effect... I think I once read something about it, but my memory of that is very faint. Try it...
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| 15:25 | If so, then use pam_env
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| 15:26 | <sebd_> it should be read by pam_env as its default envfile, and pam_env.so seems enabled by default on debian
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| 15:31 | <alkisg> /etc/pam.d/lightdm:session required pam_env.so readenv=1 user_readenv=1 envfile=/etc/default/locale
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| 15:32 | It doesn't seem to use /etc/environment; but do try it
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| 15:33 | <sebd_> works here (debian 10)
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| 15:34 | no actually it only work in an ssh session
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| 15:35 | /etc/pam.d/sshd:session required pam_env.so
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| 15:42 | <sebd_> let's try POST_INIT_printer='echo PRINTER=thePrinterQueue >> /etc/default/locale'
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| 15:43 | <mwalters> shouldn't user env vars go in ~/.profile ?
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| 15:44 | <sebd_> mwalters: we do not want it per user but per client
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| 15:45 | in LTSP5 we used to append to lts.conf LDM_PRINTER_LIST and LDM_PRINTER_DEFAULT
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| 15:45 | <mwalters> ah ok
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| 15:45 | I hadn't caught that far up
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| 15:46 | <sebd_> actually lightdm reads /etc/environment too, so it might work
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| 15:49 | <mwalters> looking at the man for ltsp.conf on ltsp2020 (or whatever it's called now), it looks like you can write shell script directly in each section... could you just `[mac]\nexport SOME_VAR=somevalue`?
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| 15:50 | I suppose it depends on at what point in the client bootstrap process that gets run
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| 15:50 | ...and as who... nevermind :)
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| 15:50 | <sebd_> that's the first thing I tried too
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| 15:50 | will try more tomorrow
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| 15:52 | mwalters: sorry, actually I tried [mac]\nPOST_INIT_PRINTER='export PRINTER=printername'
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| 15:52 | I did not try `[mac]\nexport SOME_VAR=somevalue`
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| 15:53 | <mwalters> I'm *assuming* it probably doesn't do what you want... but I'm really not sure ;)
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| 15:53 | <sebd_> I believe it does something but it does it too early in the boot process
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| 15:53 | <mwalters> I figured alkis would've suggested it, if it would :)
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| 15:53 | <sebd_> no time to read code now
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| 15:57 | <alkisg> mwalters, nah, like I said to sebd_, LTSP doesn't do anything about user sessions
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| 15:57 | In the past, ubuntu had a patch in cups for LDM_PRINTER_LIST, I'm not sure it still has that
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| 15:57 | <mwalters> makes sense now that I actually followed that train of thought after blurting it out ;)
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