IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 10 October 2019 (all times are UTC)
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| 09:08 | <Nexion22> Hello
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| 09:08 | I have a question about ltsp.conf configuration. Someone can help me ?
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| 09:08 | <alkisg> Nexion22, sure, ask
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| 09:09 | <Nexion22> Thank you
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| 09:10 | <Nexion22> I need to add 2 line in lightdm.conf but I don't know how to put them in ltsp.conf I tried with "\n" but didn't work
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| 09:10 | <alkisg> LIGHTDM_CONF="line1
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| 09:10 | line2"
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| 09:11 | <alkisg> I.e. just press enter there
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| 09:11 | <Nexion22> LIGHTDM_CONF='greeter-hide-users=true\nsession-setup-script=/bin/my_little_script.sh" << tried but not work
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| 09:11 | Ok I try
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| 09:11 | <alkisg> Don't forget `ltsp initrd` after updating ltsp.conf
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| 09:11 | <Nexion22> yes
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| 09:14 | Greaaat :) It works !
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| 09:14 | <alkisg> Nice :)
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| 09:15 | <Nexion22> This new LTSP version is really really good !
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| 09:15 | <alkisg> Glad to hear that!
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| 09:15 | You can also use a file if you want, LIGHTDM_CONF=/etc/ltsp/my-lightdm-additional-content.conf, but it's not worth it for just 2 lines
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| 09:16 | <Nexion22> So much easier to configure with this version
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| 09:16 | Ok good to know
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| 09:21 | For now all my configuration is OK but I use my old chroot LTSP 5 to update my image. I will try to put everything in a virtualbox VM but is there a simpler solution? Copy my chroot?
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| 09:22 | I don't understand how to do without ltsp-update-image
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| 09:22 | <alkisg> Sure; you can either use the server / (ltsp image /), or copy the chroot into a vm disk, or continue using the chroot
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| 09:22 | chrootless is: ltsp image /
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| 09:22 | chroot is: ltsp image /path/to/chroot
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| 09:22 | vm is: ltsp image /path/to/vm
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| 09:23 | <Nexion22> so I can put all my previous files in /opt/ltsp/.... and launch ltsp image /opt/ltsp/ ?
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| 09:24 | <alkisg> Yes; or just move them to /srv/ltsp
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| 09:24 | So that you don't even need the path
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| 09:25 | <Nexion22> Ok I try :)
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| 10:04 | <dgroos> Good Afternoon @alkisg
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| 10:04 | <alkisg> Hi dgroos, I already PM'ed you :)
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| 12:22 | <GekkePrutser> Nice to see that this is being picked up!! Thanks alkisg :D
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| 12:22 | Does the new one support OpenPGP smartcard authentication for SSH?
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| 12:22 | I'll try it anyway :)
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| 12:26 | <Nexion22> Hi again
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| 12:26 | I tested the migration of my chroot and it works! Thank you
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| 12:27 | I'm finishing my migration to the new LTSP version and I'm having a final problem
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| 12:30 | I hope that someone could help me. I use fat client image and I configured cups settings in the image and in the previous version of LTSP my printers were well installed in cups. Today when I go to the cups interface there is no more printer.
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| 12:32 | any idea ?
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| 12:47 | <mwalters> Nexion22: are these networked printers? I believe by default client cups is set to connect to the server's cups for printers
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| 12:51 | <Nexion22> yes there are. I used the same fat_client.img as before
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| 12:51 | there are something new related ?
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| 13:11 | <mwalters> not sure... I think the "right" way is to set the printers up on the server.
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| 13:12 | <Nexion22> whitch server ? LTSP ?
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| 13:16 | <mwalters> in cups on the LTSP server
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| 13:16 | the clients will connect to it remotely
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| 13:23 | <Nexion22> even with a fat client configuration ?
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| 13:24 | <mwalters> That's how it worked w/ LTSP5, I'm assuming the same for ltsp19
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| 13:24 | (yes)
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| 13:25 | <Nexion22> for me it worked with an install inside the image
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| 13:26 | <mwalters> in any case, if you configure the printers on the cups server on the ltsp server, you won't need to rebuild the image to change printer settings
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| 13:26 | You'll also get the added benefit of only having a single print queue for each printer
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| 13:27 | <Nexion22> yes but I have several LTSP server and one script to change printer IP on login :)
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| 13:27 | <mwalters> I suspect (but don't know for certain) that when the client starts, its local cups is being pointed at the server's cups
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| 13:28 | which is why you're not seeing the printers configured in the local cups server
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| 13:28 | I also have multiple LTSP servers, and still use the central cups server
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| 13:28 | (at each location)
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| 13:29 | if you're using mate/gnome on the clients, start one up and check the printers dialog to see what cups server its connected to
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| 13:30 | (or whatever gui is used for your DE)
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| 13:30 | <Nexion22> it's lxde installed from scratch. No gui for settings printer
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| 13:30 | only cups web interface
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| 13:33 | * alkisg waves | |
| 13:33 | <Nexion22> I will try to install it dynamically at startup
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| 13:33 | <alkisg> GekkePrutser: no idea what that is; give it a test, and if it doesn't, mention the details
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| 13:33 | <GekkePrutser> Thanks! :D
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| 13:33 | Will do
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| 13:34 | <alkisg> Nexion22: ltsp5 used to point cups to the server; ltsp19 doesn't do anything yet
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| 13:34 | So normally, cups shows local lan printers anyway
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| 13:35 | <Nexion22> I can add printer after fat_client start
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| 13:35 | <alkisg> Is the printer shared from the server?
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| 13:36 | <Nexion22> but with all config file previously generated in /etc/cups/ nothing work
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| 13:36 | <alkisg> Where is the printer?
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| 13:37 | <Nexion22> on lan but not installed in LTSP cups server
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| 13:37 | same as before
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| 13:37 | <alkisg> In ltsp5, if a printer was on lan and not installed in ltsp server, it wouldn't show up on the clients
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| 13:37 | So this doesn't sound right
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| 13:38 | <Nexion22> weird because it worked
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| 13:38 | <alkisg> Did you have anything in lts.conf about printing?
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| 13:38 | Or did you do anything manually with /etc/cups?
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| 13:39 | <Nexion22> I installed in the image in the same way as if it was not an LTSP machine
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| 13:39 | nothing in lts.conf and yes I placed all file manually in /etc/cups
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| 13:40 | <alkisg> The printer requires special drivers etc? It's not autodetected?
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| 13:40 | <Nexion22> not autodetected and yes ppd placed in /etc/cups/ppd/
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| 13:40 | <alkisg> Did you have CUPS_SERVER=localhost in ltsp5?
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| 13:41 | Or, were you using an *old* version of ltsp5, maybe like 5+ years old one?
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| 13:41 | <Nexion22> ~/.cups/client.conf with localhost address
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| 13:41 | <alkisg> What, per user, not per system?
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| 13:42 | <Nexion22> may be but /home/ are copied for all my user
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| 13:42 | it was a solution but may be not the best :)
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| 13:43 | <alkisg> OK so if I understand this correctly, both in ltsp5 and in ltsp19 you were completely bypassing ltsp and you were configuring printing yourself
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| 13:43 | Which should work in both cases
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| 13:43 | Now, the ltsp way to do it is:
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| 13:43 | You only install the network printer to your server
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| 13:43 | This is not ideal because traffic goes through your server, but it's easier,
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| 13:43 | and, you point cups to the server, not to localhost
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| 13:44 | For this to work, printer sharing should be enabled on the server
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| 13:44 | `cupsctl | grep share` should show 1
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| 13:45 | <Nexion22> is there a variable to point to the server ? or is it automaticaly ?
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| 13:45 | <alkisg> In ltsp5 it was automatic,
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| 13:45 | while ltsp19 that defaults to cups=localhost, should again add shared lan printers automatically,
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| 13:46 | now, to tell ltsp19 to use cups=server, you'd need one POST_INIT_xx='sed /etc/cups/...' command
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| 13:46 | <Nexion22> Ok where is this setting ?
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| 13:47 | <alkisg> What's the output of `cupsctl | grep share` on the server?
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| 13:47 | <Nexion22> for now no cups server installed
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| 13:47 | <alkisg> Do you have epoptes installed?
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| 13:47 | <Nexion22> No
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| 13:48 | minimal install from debian netinstall
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| 13:48 | <alkisg> But cups is installed in the chroot?
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| 13:48 | <Nexion22> yes
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| 13:48 | <alkisg> How much ram on the clients, e.g. 2gb?
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| 13:48 | <Nexion22> mmm yes
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| 13:48 | <alkisg> OK, the quickest way to try would be:
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| 13:49 | 1) move away ~/.cups/client.conf on user01 and user02
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| 13:49 | 2) boot pc01, add the printer locally so that it works; and also run cupsctl _share_printers=1
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| 13:50 | 2) boot pc02, and try to see if it automatically sees the shared network printer from pc01, without installing the printer
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| 13:50 | *that was 3
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| 13:50 | So if this test works, then you only need to install cups on the server and install the printer and enable printer sharing
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| 13:51 | If it doesn't, then you need to point CUPS=server for the clients, like ltsp5 did
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| 13:51 | <Nexion22> Okey
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| 13:51 | <alkisg> The test works for normal, autodetected printers; I'm not sure if it works for those that require a driver, that's why I'm asking
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| 13:51 | Btw, I left the whole printing deal for later, as "driverless printing" is now a thing
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| 13:51 | And I'm waiting to see what's the new cool way to do it
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| 13:52 | <Nexion22> and there is a way to block specific printer for specific user ?
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| 13:52 | <alkisg> Eh, just set ~/.cups/client.conf to wherever for this user
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| 13:53 | <Nexion22> oh there is an option to do that
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| 13:54 | <alkisg> https://wiki.debian.org/DriverlessPrinting
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| 13:54 | I.e. I hope that the server would do the heavy lifting, so that the clients would be able to do driverless printing without us having to install drivers in the chroots etc
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| 13:56 | <Nexion22> a lot of things to test. I'm trying
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| 13:57 | thanks for help :)
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| 13:57 | <alkisg> Np. I think to set cups=server, you don't need set, but echo something > /etc/cups/client.conf
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| 13:58 | The same thing that you have in ~/.cups/client.conf
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| 13:58 | Can't check atm
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| 13:59 | <Nexion22> I have nothing to restrict printer in client.conf
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| 14:00 | by looking quickly I did not see anything on debian wiki
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| 14:08 | <alkisg> I meant that you could set printer server=not existing cups server
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| 14:10 | <Nexion22> in fact I would like to install all printers on the server and allow to users only those who are on their geographical location
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| 14:19 | <alkisg> "location" sounds like "per ltsp client", not like "per ltsp user"
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| 14:20 | I.e. just don't set cups=server in /etc/cups/client.conf
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| 14:20 | (that goes in ltsp.conf, under client mac addresss)
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| 14:23 | <Nexion22> if I don't set cups=server then I will not have any printers ?
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| 14:24 | sorry i'm not friend with cups :D
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| 14:50 | <Nexion22> Finished workday. Bye everyone
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