IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 6 July 2020 (all times are UTC)
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| 01:47 | <wilbur> doing a standard debian 18.04 server ltsp client, and getting the following error. note i added the use to visudo would that kill it?
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| 01:47 | root@ltsp:/home/william# ltsp image moonlight
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| 01:47 | Running: losetup -rP /dev/loop1 /srv/ltsp/moonlight.img
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| 01:47 | Running: mount -t tmpfs -o mode=0755 tmpfs /tmp/tmp.Hl6Zej5oCv/tmpfs
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| 01:47 | Running: mount -t ext4 -o ro,noload /dev/loop1p2 /tmp/tmp.Hl6Zej5oCv/tmpfs/0/looproot
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| 01:47 | Running: mount -t overlay -o upperdir=/tmp/tmp.Hl6Zej5oCv/tmpfs/0/up,lowerdir=/tmp/tmp.Hl6Zej5oCv/tmpfs/0/looproot,workdir=/tmp/tmp.Hl6Zej5oCv/tmpfs/0/work /tmp/tmp.Hl6Zej5oCv/tmpfs /tmp/tmp.Hl6Zej5oCv/root/
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| 01:47 | Cleaning up moonlight before mksquashfs...
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| 01:47 | Traceback (most recent call last):
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| 01:47 | File "/usr/share/ltsp/client/login/pwmerge", line 440, in <module>
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| 01:47 | main(sys.argv)
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| 01:47 | File "/usr/share/ltsp/client/login/pwmerge", line 434, in main
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| 01:47 | pwm = PwMerge(args[0], args[1], args[2], **dopts)
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| 01:47 | File "/usr/share/ltsp/client/login/pwmerge", line 117, in __init__
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| 01:47 | self.dpasswd, self.dgroup = self.read_dir(ddir, dur or dgr)
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| 01:47 | File "/usr/share/ltsp/client/login/pwmerge", line 151, in read_dir
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| 01:49 | i tried running "passwd" on the client when running as the root user, set a simple password for it, still no joy
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| 08:07 | <wilbur> any help with this would be greatly appreciated
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| 08:19 | ltsp image / <-- this works so guessing must be client
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| 08:53 | <danboid> alkisg, I presume you're the main epoptes dev?
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| 08:54 | Should I be able to test epoptes in a VM?
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| 08:54 | Either VB or qemu
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| 09:17 | <alkisg_web> danboid, yes to all
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| 09:17 | <danboid> alkisg_web, Hi!
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| 09:18 | OK, good
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| 09:18 | <alkisg_web> Hi! From phone cant type a lot
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| 09:19 | wilbur, run pwck inside the image
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| 09:19 | <danboid> I know Veyon also supports Windows. Does epoptes have any advantages over Veyon?
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| 09:19 | Like, easier config?
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| 09:19 | <alkisg_web> Italc didn't work and we developed epoptes because of that
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| 09:20 | Dunno about veyon it came much later
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| 09:20 | <wilbur> many thanks, will try soon
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| 09:20 | <danboid> Yeah I know it "the new iTALC"
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| 09:21 | <alkisg_web> Epoptes is very easy to setup and very flexible
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| 09:21 | It supports ltsp out of the box
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| 09:21 | <wilbur> should i run pwck as root or as the admin user?
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| 09:21 | <alkisg_web> With sudo
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| 09:21 | <danboid> One advantage epoptes has for me is it is in the 16.04 repos whilst veyon pnly recently entered the repos
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| 09:22 | OOTB LTSP support is a big win too
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| 09:22 | what does LTSP support mean tho?
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| 09:23 | I know what LTSP is ofc
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| 09:23 | but what does epoptes LTSP support bring?
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| 09:23 | <alkisg_web> Automatic client discovery etc
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| 09:24 | <danboid> Massive win for LTSP users then
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| 09:25 | <alkisg_web> We develop both ltsp and epoptes so we make sure they play nice
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| 09:53 | <danboid> alkisg, What size of class can be managed with epoptes?
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| 09:56 | alkisg, epoptes lets you send messages to one or all clients right? Its just text right, no support for voip chat?
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| 09:57 | I very much doubt it supports voice chat :)
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| 09:58 | Being able to send messages should be enough
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| 09:59 | Say its a wired gigabit LAN, whats the max number of clients that can be managed
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| 10:03 | I don't get its security tho. It seems that any user in the epoptes group can control clients. What if more than one machine on the lan has epoptes installed?
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| 10:04 | Ah hold on
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| 10:05 | Must the epoptes server be the same machine / IP as the LTSP server?
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| 11:34 | <wilbur> thanks everyone resolved the issue with ltsp failing, looked like a keyboard/chair error, the installer for ubuntu 18.04 must not have finished correctly. did a fresh install and worked well
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| 12:21 | <wilbur> with the client the /home/user/.profile is missing along with the other files in the directory, is this normal? is there a way to build them on the ltsp server?
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| 12:30 | <alkisg_web> wilbur, home is normally mounted via sshfs
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| 12:30 | It's not contained in the image
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| 12:31 | danboid, epoptes doesn't need to be in lan
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| 12:31 | It should be able to serve thousands of clients
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| 12:35 | <danboid> How is auth handled then?
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| 12:35 | <alkisg_web> Auth? Users in epoptes group can launch it, that's all
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| 12:36 | <danboid> I mean what stops anyone booting a Linux machine on the LTSP network and controlling clients desktops?
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| 12:37 | controlling/viewing
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| 12:37 | <alkisg_web> He doesn't have the epoptes server private cerificate
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| 12:38 | See the installation page for how the clients trust the certificate initially
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| 12:39 | <danboid> OK
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| 12:39 | Thanks
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| 12:39 | <alkisg_web> Np
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| 12:49 | <wilbur> so if i wanted to add something to /home/user for example, how would i go about that please?
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| 13:38 | <wilbur> is there a manual page or simliar for showing how to configure / add t o the /home as i am not familar with mounting via sshfs ?
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| 13:39 | <wilbur> sorry for repeat question, i didn't scroll down enough
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| 13:40 | <alkisg_web> wilbur, you'd just put that in the server /home/user, not in the image
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| 13:40 | sshfs is the default, you don't need to enable it
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| 13:41 | <wilbur> am confused as on the ltsp server i have /home/william/.profile, however it is not on the pxe client
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| 13:43 | <alkisg_web> What's the output of this on the client? mount | grep home
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| 13:46 | <wilbur> returns nothing
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| 13:46 | <alkisg_web> This is wrong then, do you have sshfs installed?
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| 13:47 | <wilbur> echo $PWD
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| 13:47 | this gives /home/william
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| 13:47 | sshfs on the host,, checking now
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| 13:47 | <alkisg_web> Type sshfs
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| 13:47 | On the client
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| 13:48 | Also try su otheruser
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| 13:48 | To see if you get error messages
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| 13:48 | <wilbur> sshfs installed on both host and client
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| 13:48 | i did get a error message when first loading in
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| 13:48 | <alkisg_web> Gotta go, later
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| 13:48 | <wilbur> using automatic log
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| 13:49 | .Login incorrect.
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| 13:49 | <wilbur> To run a command as administrator (user "root"), use "sudo <command".
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| 13:51 | ok, i do "sudo su" to switch to root, then i do "su william",,, message comes up read: Conenction reset by peer .Login incorrect.
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| 13:57 | <wilbur> am running in single NIC mode, do i have to do this? Change IPAPPEND 3 to IPAPPEND 2 ?
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| 14:27 | <wilbur> worked it out, had to add the user into ltsp.conf under the client mac
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| 17:09 | <wilbur> does each time a client loads have a unique uuid ? is there a way to set it static or use the host?
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| 18:28 | <alkisg> wilbur: yes, the clients have static, unique ids, based on their mac addresses
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| 18:50 | <TheProf> Hello. Is there a recommended way to move user accounts and their files from one LTSP server to another? Our main server drive failed so we're swtiching to another machine and have a few hundred to move and half a TB of /home data. Thank you.
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| 18:53 | <vagrantc> nothing specific to LTSP
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| 18:54 | <alkisg> Indeed, not specific to ltsp, well, except if one wishes to use the pwmerge ltsp tool for that. TheProf: do you have the old /etc/passwd and the old /etc/shadow?
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| 18:54 | <vagrantc> rsync could work, but you want to make sure you create the accounts with the same uid/gid and so on
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| 18:54 | although you can chown/chmod as needed after the fact alternately
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| 18:55 | <alkisg> Btw, /me waves to vagrantc and says thanks for ltsp 20.06 ;)
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| 18:57 | <vagrantc> alkisg: you did all the hard work :P
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| 18:57 | alkisg: so likewise thanks :)
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| 18:58 | i should consider adding support for some more arm systems ... i have a few nice candidates
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| 18:58 | finally some are getting accelerated graphics and such with free drivers and all that
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| 18:58 | <alkisg> I'm expecting an odroid soonish
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| 18:59 | Some user donated it to motivate me to add ltsp support for it
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| 18:59 | <vagrantc> and decent amounts of ram and ... still somewhat slow CPUs
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| 18:59 | which?
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| 18:59 | <alkisg> Other than that, I'm not sure what I'm going to do with it :D
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| 18:59 | Dunno
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| 18:59 | <vagrantc> heh
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| 18:59 | odroid typically require random signed blobs for arm-trusted-firmware bits
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| 18:59 | <alkisg> I already have 3 remote-desktop setups, one for each rpi version... rpi2, rpi3 and rpi4... I don't need yet another one :D
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| 19:00 | Oucch
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| 19:00 | Which one are you thinking to add support for?
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| 19:00 | <vagrantc> the rockchip rk3399 boards are looking pretty reasonable ... the rockpro64 should be reasonably well supported
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| 19:00 | <TheProf> Hello. I have access to all the files on the original machine thanks to a backup.
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| 19:00 | <vagrantc> also the rk3328-rock64
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| 19:01 | <TheProf> That includes /etc/passwd and /etc/shadow
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| 19:02 | <alkisg> TheProf: then why don't you just put all that data to a new disk? Linux doesn't care about hardware changes...
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| 19:05 | <TheProf> I have high ignorance with these items (I maintain the system as a volunteer!) so I imagine I can't just copy the old /etc/passwd and /etc/shadow over the new one but need to replace it? Or I need to match up the UID/GID?
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| 19:06 | <vagrantc> you'll need to make sure the uid/gid don't conflict with existing users ... but you should be able to safely sync uid/gid 500+ (other than maybe the initial user, if that's different)
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| 19:10 | <TheProf> Sure I can do that. I am the initial user so I can track that one account as you said. Then I can copy over the old /home files (since there's nothing in the new /home anyways) and then execute a chown/chmod command and be up and running?
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| 19:14 | <vagrantc> the other option would be to just rsync them all as root, and then add the users later and chown/chmod to the appropriate users
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| 19:15 | if they're all simply /home/USERNAME or some similar layout where it's easy to tell who should own what files
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| 19:20 | <TheProf> In the past I've used webmin to export to a file the user information (including password, home directory, groups, etc) and then use webmin on the new server that same file and it would create all the folders, permissions, etc. and then I copied over the files. I was trying to avoid installing webmin just for that purpose.
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| 19:21 | <alkisg> less /usr/share/ltsp/client/login/pwmerge
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| 19:21 | Usage: pwmerge [--sur=] [--sgr=] [--dur=] [--dgr=] [-l] [-q] sdir ddir mdir
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| 19:21 | Merge passwd, group and optionally shadow and gshadow from source directory
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| 19:21 | sdir and destination directory ddir into a merge directory mdir.
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| 19:22 | I.e. you can merge the old users to the new ones with one command...
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| 19:22 | <TheProf> That's great thank you for the information I will take a look at it
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| 19:23 | <alkisg> I.e. just sudo pwmerge /path/to/old/etc /etc /home/administrator/toexamine/etc
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| 19:23 | And if you examine the result and it's fine, then you just copy it to /etc
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| 19:24 | (it can also just save to etc directly)
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| 19:25 | <TheProf> There's always great tools out there but just need to find them!
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| 19:25 | <alkisg> It took me a week to write it ;)
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| 19:26 | <TheProf> Even more cool. Thank you.
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| 22:34 | <wilbur> is it possible to have a windows 10 ltsp client?
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| 22:35 | <vagrantc> what do you mean?
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| 22:35 | connect to a windows 10 server?
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| 22:36 | LTSP is essentially just a way to network boot a computer to run linux ...
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| 22:48 | <wilbur> when i turn off LVM for hard disks the LTSP seems to build better (ubuntu 20.04)
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| 22:49 | is ok about the windows, realize now this is purely for linux, am running moonlight-qt to the window box when required
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