IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 6 December 2020 (all times are UTC)
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| 16:57 | <eu^ftth-masked> Hello, I have a question about LTSP19 on Ubuntu 20.04. Om 18.04 I had an empty 54.sh file with ldap authentication. I also had pam-mount to mount samba shares for each user (not the home dir). When I tried the same setup (starting with empty 54.sh) I found that auth-client-config was gone. I added LDAP to nsswitch.conf manually, and I can log in
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| 16:57 | with LDAP users just fine.
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| 16:58 | However, mounting smb shares from /etc/security/pam_mount.conf.xml doent work anymore
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| 16:59 | I used the exact same settings as I used om 18.04, and after I logged in with user "test1" the samba share wasnt mounted. But, when I did "su test1" (while already logged in from test1) the share did get mounted
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| 17:00 | Does anyone have any idea how to fix this?
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| 17:18 | * alkisg will be around in 30' | |
| 17:20 | <eu^ftth-masked> Thank you
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| 17:42 | <alkisg> eu^ftth-masked: ltsp runs `pam-auth-update` at boot, to install its pam script
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| 17:42 | It's the correct way to update pam files
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| 17:42 | If you do manual changes in pam, make sure they're NOT in the section that is managed by debian and pam-auth-update
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| 17:43 | Regarding the pam options of ltsp, see this comment: https://github.com/ltsp/ltsp/issues/338#issuecomment-735230997
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| 17:43 | It can go to primary/additional sections of pam, or not get installed at all
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| 17:44 | Now regarding samba and auth-client-config, I've no idea, never used them
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| 17:45 | Note that you should use an empty 54-pam, you can just set PAM_AUTH_TYPE="0" if you don't want pamltsp to get installed
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| 17:45 | *shouldn't
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| 17:46 | <eu^ftth-masked> Ah, ok
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| 17:46 | <alkisg> All these ^ are currently in the ltsp proposed ppa
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| 17:46 | Not in the stable ppa yet
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| 17:46 | <eu^ftth-masked> empty 54.sh was the "best" way to do it back in 2019
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| 17:46 | <alkisg> No, it was OMIT_FUNCTIONS
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| 17:46 | !ltsp.conf
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| 17:46 | <ltspbot> ltsp.conf: Configuration file for LTSP: https://ltsp.org/man/ltsp.conf/
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| 17:47 | <alkisg> Search for OMIT_FUNCTIONS there
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| 17:51 | <eu^ftth-masked> I havent made any manual changes to the PAM files
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| 17:51 | And when I "su" to a user, the share gets mounted properly
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| 17:51 | but not when a user logs in via PXE
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| 17:52 | <alkisg> cat /etc/pam.d/common-auth, in the booted client
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| 17:52 | Does that have pamltsp?
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| 17:52 | <eu^ftth-masked> sec
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| 17:58 | No, it does not
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| 17:59 | <alkisg> Then ltsp isn't involved in your pam settings. Do you want me to see with vnc?
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| 17:59 | !vnc-dide
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| 17:59 | <ltspbot> 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.
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| 18:00 | <eu^ftth-masked> Nope, LTSP is indeed not in the PAM files. But for some reason the PAM files get run _before_ a user logs in, and not afterwards (atleast so it seems)
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| 18:01 | As I can see s CIFS error before the login prompt (login failed, which is correct as the user hasnt logged in yet)
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| 18:01 | <alkisg> The pam configuration is read and executed at the time that users authenticate or start a session
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| 18:01 | <eu^ftth-masked> And running su also triggers it
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| 18:02 | but logging in doesn' t trigger it for some reason
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| 18:02 | <alkisg> I think you just have misconfigured pam, unrelated to ltsp
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| 18:03 | <eu^ftth-masked> Very strange, as I use the same settings as on 18.04, and it worked there
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| 18:03 | <alkisg> Eh, software changes
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| 18:08 | <eu^ftth-masked> Ok, I just tested logging in with tty3 instead of the GUI on the LTSP client
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| 18:08 | and that also worked
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| 18:08 | <alkisg> Other than installing itself in PAM, which you told it not to, LTSP doesn't do anything regarding logins
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| 18:09 | So if it works with tty but not with DM, then it's either a problem with home permissions, or just wrong pam settings
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| 18:10 | <eu^ftth-masked> It tries to mount to /networkshares/sharename. The homefolder is mounted with NFS as FSTAB_HOME is ltsp.conf, and that works perfectly
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| 18:11 | So its not a home folder perm issue (Atleast not in TTY)
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| 18:12 | <alkisg> OK, sorry I can't help as (1) it's not related to LTSP, and (2) I don't know about samba enough to help without (3) screen sharing; you could ask in #ubuntu though if noone else responds
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| 18:13 | <eu^ftth-masked> I'll do a complete reinstall. Ill post back here in ~45 minutes if I found a solution
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| 18:14 | <alkisg> OK
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| 19:22 | <eu^ftth-masked> Hasn' t helped unfortunately
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| 19:23 | Using PAM_AUTH_TYPE="0" made no difference aswell
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| 19:36 | <alkisg> But you already had remove ltsp from pam
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| 19:36 | ltsp isn't your issue here
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