IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 9 June 2017 (all times are UTC)
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| 07:46 | <alkisg> ZAJDAN: I've seen an issue with epoptes and screen locking in a recent ubuntu installation. It was on a thin client (not fat), and the cause was that the RAM was completely exhausted
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| 07:47 | The RAM was exhausted because the "apt-daily" service ran `apt-get update` automatically, making /cow on the client waste 300 MB RAM
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| 07:47 | Check if that's what's causing the issue in your installation too. If it's out of RAM, then you'll also have other issues...
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| 08:03 | <exebat> Hi all
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| 08:03 | I have a problem with 2 of 30 clients
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| 08:05 | I installed realtek-firmware, updated the image, replaced the LAN cable, replaced the whole client - brand new PC and it still stalls
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| 08:05 | after some time icons are replaced with blank icons
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| 08:06 | and user has to restart the PC
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| 08:06 | Does anyone have any suggestion ?
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| 08:07 | it started happening 2 weeks ago just like that - it worked without problems for 2 years
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| 08:09 | OS is Debian Jessie
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| 08:10 | <vlt> It worked without problems for 2 years on that brand new PC? o_O
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| 08:11 | <exebat> no, on the old one
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| 08:11 | I tried everything I could think of on the old PC and then replaced the PC but the problem continues
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| 08:12 | and I have 2 clients with the same problem out of 30 computers
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| 08:13 | <vlt> The old and the new one are the two clients?
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| 08:13 | <alkisg> Try putting the client into another work place, so as to test the whole network infrastructure. E.g. cables inside walls etc
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| 08:13 | My english there sucked, I hope you got what I meant
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| 08:14 | So if e.g. pc2 works and pc6 fails, swap them
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| 08:14 | <exebat> no - 2 old computers with problem replaced with 2 new ones and still producing same error
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| 08:14 | <alkisg> If then pc2 starts to fail, you'll know that the problem is with the networking infrastructure
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| 08:14 | <exebat> I also think that
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| 08:15 | <alkisg> E.g. you might need to review your network sockets, push the cables there in the joints etc
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| 09:25 | <ZAJDAN> alkisg: now I read Your information about the locking problem because of the exhausted RAM....so I could have a chance :_)
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| 09:27 | <alkisg> ZAJDAN: do you have your setup available currently? I have a few minutes free, I could take a look...
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| 09:28 | <ZAJDAN> alkisg: ok..I will connect the machine
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| 09:29 | alkisg: could you sent me vnc connection info please
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| 09:29 | <alkisg> !vnc-dide
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| 09:29 | <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.
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| 09:30 | <alkisg> ZAJDAN: boot a client
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| 09:31 | <ZAJDAN> ok
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| 09:32 | is there
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| 09:34 | alkisg:when you lock the client and will wait 10/20 secundes..it makes the proble..unlock immediately after lock works good
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| 09:35 | and it is here
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| 09:38 | <alkisg> ZAJDAN: moment... brb...
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| 09:38 | <ZAJDAN> alkisg: np
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| 10:07 | <alkisg> http://paste.debian.net/970741/
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| 10:08 | It seems like a xprop bug, instead of reading the property it deletes it!!
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| 10:08 | Let me check more...
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| 10:08 | <ZAJDAN> np
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| 10:12 | <alkisg> x11-utils 7.7+2
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| 10:21 | <alkisg> ZAJDAN: as far as I can tell, this is a bug in x11-utils, not in epoptes
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| 10:22 | For some reason, `xprop -root EPOPTES_LOCK_SCREEN_PID` deletes the property instead of reading it
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| 10:22 | I don't have more time now to try to fix the problem in x11-utils; but it's easy to put a work around there
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| 10:24 | <ZAJDAN> I can let the session opened in the computer where you are connected now, if you will want to look later
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| 10:25 | <alkisg> Nah I'll go away for too long, not worth to wait
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| 10:25 | * alkisg waves, later... | |
| 10:26 | <ZAJDAN> ok...if you will find solution, just say and I will give you the machine to try it
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| 10:27 | may I disconnect from VNC?
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| 15:27 | <BuddyButterfly> hi
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| 15:28 | I have tested to connect to fat ltsp clients via xrdp.
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| 15:28 | directly.
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| 15:28 | xrdp runs correctly and connection is also fine.
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| 15:28 | though, login always fails. any idea how to get this to work?
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| 15:30 | connection log says
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| 15:30 | sending login info to session manager, please wait....
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| 15:30 | xrdp_mm_process_login_response: login failed.
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| 15:31 | I guess it has something to do with the ltsp session manager....
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| 15:37 | <alkisg> You want to connect to a fat client, and not to the ltsp server?
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| 15:38 | <alkisg> Fat clients don't have users and you can't authenticate to login there
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| 15:38 | While a user is logged in to an ltsp fat client, you could login if you set this:
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| 15:38 | !LDM_HASH_PASSWORD
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| 15:38 | <ltsp> Error: "LDM_HASH_PASSWORD" is not a valid command.
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| 15:38 | <alkisg> !LDM_PASSWORD_HASH
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| 15:38 | <ltsp> LDM_PASSWORD_HASH: LDM_PASSWORD_HASH=True in lts.conf saves the password hash to /etc/shadow on login, so that the users can unlock the screensaver etc. If they happen to change their password though, that only takes effect until logout.
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| 15:40 | <BuddyButterfly> alkisg: ltsp: I have in one client LDM_PASSWORD_HASH=yes, is this OK?
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| 15:40 | will try with my test client.
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| 15:41 | <alkisg> Try to press alt+ctrl+f1 to that client, and login.
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| 15:41 | But first login to ldm; otherwise no users would exist
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| 15:41 | <BuddyButterfly> and yeah, this was my pitfall in thinking. On the client there are no users....
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| 15:42 | <BuddyButterfly> will try....
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| 15:45 | wow, cool, works.
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| 15:45 | if I log in with ldm I am able to also connect via xrdp to fat client.
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| 15:46 | all that is done is to copy shadow to client upon login?
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| 15:49 | then I guess there is some autologin function?
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| 15:49 | which I can configure in lts.conf. Just a specific user....
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| 15:53 | got it.....
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| 15:53 | LDM_USERNAME = user1 LDM_PASSWORD = password1
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| 16:04 | <alkisg> You can also put an RCFILE command to create a specific user
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| 16:04 | !password
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| 16:04 | <ltsp> I do not know about 'password', but I do know about these similar topics: 'ROOT_PASSWORD_HASH', 'LDM_PASSWORD_HASH'
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| 16:04 | <alkisg> !ROOT_PASSWORD_HASH
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| 16:04 | <ltsp> ROOT_PASSWORD_HASH: to be able to login as root in vt1, with password "qwer1234", put this in lts.conf: INIT_COMMAND_01="sed 's!^root:[^:]*:!root:$6$p2LdWE6j$PDd1TUzGvvIkj9SE8wbw1gA/MD66tHHlStqi1.qyv860oK47UnKcafSKqGp7cbgZUPlgyPv6giCVyCSCdJt1b0:!' -i /etc/shadow"
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| 16:05 | <BuddyButterfly> guys, many tnx. works perfect!
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| 16:05 | <alkisg> Not that one specifically; you'd use "useradd" instead
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| 16:05 | np
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| 16:05 | <BuddyButterfly> auto logs in with username and pw and I can now connect with any rdp client to the fat clients.....
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| 16:05 | <alkisg> With a "local user", you wouldn't need to autologin
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| 16:06 | But whatever works best for you, depending on your needs
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| 16:06 | <BuddyButterfly> alkisg: ah, even better. how to achieve?
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| 16:06 | <alkisg> You wouldn't have local /home/username though
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| 16:06 | See my instructions above ^
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| 16:06 | <BuddyButterfly> alkisg: will have a look. scrolled too fast ;-)
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| 16:08 | alkisg: you mean ltsp's doc?
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| 16:08 | <alkisg> ltsp is the bot that keeps notes, yes
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| 16:08 | So I told it to write you a note that I kept earlier
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| 16:09 | <BuddyButterfly> ahhhh
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| 16:10 | was not aware that it is a bot ;-)
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| 16:10 | tnx for clarification.
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| 16:10 | lol
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| 16:11 | alkisg: I tried to copy complete shadow over in init command.
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| 16:11 | isn't that possible?
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| 16:12 | <alkisg> man useradd
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| 16:14 | <BuddyButterfly> alkisg: ah, you mean creating a complete new user locally with useradd in init command?
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| 16:14 | I think I got it now.
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| 16:15 | <alkisg> Yes
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| 16:16 | <BuddyButterfly> and it would (if I state to create a home) create a home dir under /home that would also vanish upon restart?
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| 16:17 | <alkisg> Yes
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| 16:58 | <BuddyButterfly> alkisg: somehow it does not work with local user. or useradd is not correctly working.
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| 17:00 | alkisg: will init command be executed as root?
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| 17:13 | <epoptes_user2> Hi
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| 17:13 | <vportaqt> HI guys!
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| 17:20 | <alkisg> BuddyButterfly: yes, init commands run as root
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| 17:20 | Check your quoting, if you have $ anywhere you need to escape it
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| 17:20 | Hi vportaqt
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| 17:22 | <vportaqt> Can there be two epoptes servers connected to a single client?
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| 17:24 | <alkisg> It's the opposite. Epoptes clients connect to servers.
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| 17:24 | You can have one epoptes client running per user, but it's usual to have them connect to different servers
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| 17:26 | <BuddyButterfly> alkisg: yep, had $ in it. trying with escaped $....
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| 17:31 | alkisg: works! tnx a lot.
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| 17:36 | <BuddyButterfly> alkisg: last question. is it possible to reference a bash script in init command. such as not to have tens of init commands?
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| 17:49 | <alkisg> Of course, but you need to include it into the image
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