IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 26 April 2014 (all times are UTC)
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| 10:53 | <gbaman> hey alkisg got a weird bug.. Have some users on my LTSP server, and if I ls /home/pupil there is lots of files and folders
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| 10:54 | if I type cd ~ on the logged in LTSP client, I just have /home/pupil/desktop ?
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| 10:56 | if I ssh into the server, from the client using the users credentials, all files are there fine
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| 10:58 | have just tried creating a new user, it is the same
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| 11:04 | the home folders get reset on every reboot
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| 11:04 | weirdly isnt all the users..
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| 11:26 | <gbaman> Not sure why I didn't notice the bug before, a user did and found a solution for it, at least when using NFS
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| 11:26 | https://github.com/gbaman/RaspberryPi-LTSP/issues/12
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| 11:26 | but not helping with NBD
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| 12:50 | <gbaman> alkisg: ?
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| 12:55 | After more checking, it seems to be all uses now when using NBD
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| 12:56 | Are users home folders also shared via NBD?
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| 13:13 | <alkisg> gbaman: by default, SSHFS is used for home dirs both when using NBD or NFS for /.
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| 13:13 | An alternative is to use NFS for home dirs, but that's not the default
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| 13:13 | <gbaman> any idea why SSHFS isnt working?
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| 13:14 | <alkisg> If the folder /home/pupil is already there, LTSP thinks that the sysadmin mounted the home dir via other means, so it's not using SSHFS
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| 13:14 | Does the problem happen on the first login of that student, or only on second, third etc logins?
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| 13:15 | <gbaman> all
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| 13:15 | I was just checking my newly installed machine, it is all logins
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| 13:15 | not sure how I hadnt noticed it
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| 13:15 | <alkisg> I mean first login after client boot
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| 13:15 | For the same user
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| 13:15 | <gbaman> first login
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| 13:15 | tried multiple users
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| 13:15 | including new users
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| 13:16 | will create another new one now on this newly installed machine
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| 13:16 | <alkisg> !vnc
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| 13:16 | <ltsp> I do not know about 'vnc', but I do know about these similar topics: 'x11vnc', 'kvm-vnc'
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| 13:16 | <alkisg> !x11vnc
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| 13:16 | <ltsp> x11vnc: One way to share a graphical screen with a remote person is: [local pc] port forward 5500, run: vncviewer -listen [remote pc] sudo apt-get install x11vnc; x11vnc -noshm -connect <technician-ip>
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| 13:16 | <alkisg> Nah
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| 13:17 | !learn vnc-plinet as to share your screen with me: sudo apt-get install x11vnc; x11vnc -noshm -connect plinet.ioa.sch.gr
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| 13:17 | <ltsp> The operation succeeded.
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| 13:17 | <alkisg> If you want, do that ^ from a client...
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| 13:18 | <gbaman> ok, 2 secs
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| 13:19 | rebuilding NBD image..
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| 13:20 | <alkisg> You can do it (apt-get install) live, on the fly, as long as you have root access on the client and it has enough ram
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| 13:22 | <gbaman> ok, booting now
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| 13:22 | which I didnt have enabled :)
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| 13:23 | root is now enabled
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| 13:25 | <alkisg> !screen_08
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| 13:25 | <ltsp> screen_08: To get a root shell on a Debian thin client, put SCREEN_07=ldm, SCREEN_08=shell and SCREEN_DEFAULT=07 to lts.conf.
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| 13:26 | <alkisg> ...no need to update nbd to get root...
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| 13:26 | <gbaman> does that command need to be run as root btw?
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| 13:27 | just ran it as normal user and ended up with quite a few errors
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| 13:27 | <alkisg> The x11vnc command? No, as a user.
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| 13:27 | x11vnc -noshm -connect plinet.ioa.sch.gr
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| 13:28 | <gbaman> well hello
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| 13:31 | just to clarify, it is a Raspberry Pi. Also I have got a file in /home/test1 called test.txt on the server
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| 13:38 | <alkisg> gbaman: your fuse module isn't working
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| 13:38 | <gbaman> ok?
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| 13:38 | <alkisg> It don't know why, but it doesn't look ltsp related
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| 13:39 | So ask in #raspbian or wherever else you want, about how to make fuse work
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| 13:39 | Also try booting with an older kernel
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| 13:39 | <gbaman> ok, will do
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| 13:40 | how will I know if it is working?
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| 13:40 | <alkisg> if `sshfs user@server: /tmp/somedir` works
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| 13:41 | <gbaman> ok
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| 13:41 | booting a normal sd card
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| 13:42 | <alkisg> Or try netbooting the 3.2 kernel you have there
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| 13:44 | <gbaman> normal raspbian sshfs not found :)
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| 13:44 | installing
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| 13:44 | <alkisg> No problem there, you can install it, or just try `su -; modprobe fuse`
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| 13:45 | <gbaman> fuse is happy on normal raspbian..
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| 13:46 | <alkisg> What kernel?
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| 13:46 | 3.13?
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| 13:46 | I.e. is that the same kernel you had while trying with ltsp?
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| 13:46 | <gbaman> 3.10.32+
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| 13:46 | <alkisg> (04:46:24 μμ) alkisg: I.e. is that the same kernel you had while trying with ltsp?
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| 13:47 | I don't remember the version, so just say yes/no...
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| 13:47 | <gbaman> not sure
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| 13:47 | files in boot folder are 3.10.3
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| 13:47 | <alkisg> So it's not the same kernel
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| 13:47 | <gbaman> hmm
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| 13:47 | <alkisg> OK just boot ltsp with the 3.2 kernel
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| 13:47 | To try with that one
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| 13:49 | <gbaman> am assuming it isnt as simple as just copying over the kernel files
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| 13:49 | as LTSP needs its stuff in the initrd
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| 13:49 | <alkisg> In the image I saw, you had 3.2 installed
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| 13:49 | So it does contain the ltsp initrd stuff
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| 13:50 | Vnc from the server to me:
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| 13:50 | !vnc-plinet
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| 13:50 | <ltsp> vnc-plinet: to share your screen with me: sudo apt-get install x11vnc; x11vnc -noshm -connect plinet.ioa.sch.gr
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| 13:50 | <gbaman> ohh, found them
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| 13:50 | will try it first
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| 13:53 | think me and vagrantc had issues with this kernel..
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| 13:53 | booting
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| 13:54 | works
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| 13:58 | so is just that version of the kernel..
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| 13:59 | <alkisg> Yeah it looks like fuse needs to access some symbol which isn't there, it doesn't sound ltsp related at all
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| 14:00 | <gbaman> ok, yea, cant use this old kernel.. Does not have some of the new graphics accelerated stuff
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| 14:30 | <gbaman> work_alkisg: how does one get kernel and initrd with LTSP stuff inside? Is it possible without rebuilding?
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| 14:30 | <work_alkisg> All chroot kernels get the initrd stuff automatically
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| 14:31 | So just install any kernel in the chroot
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| 14:32 | <gbaman> apt-get install linux-image-rpi wont grab the actual kernel, will it?
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| 14:32 | (is a shortcut to most recent version)
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| 14:32 | <work_alkisg> https://packages.debian.org/search?keywords=linux-image-rpi
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| 14:33 | I've never seen pi, I don't know its packages
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| 14:33 | And I don't see them in the archive
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| 14:33 | <gbaman> it is in the raspbian repo
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| 14:33 | <work_alkisg> OK, but I don't want to learn about pi either
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| 14:33 | :)
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| 14:34 | No time for that, too busy trying to fix 14.04 for Greek schools...
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| 14:34 | <gbaman> :)
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| 14:34 | how do you install a new kernel normally then?
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| 14:34 | (new to all this)
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| 14:35 | as installing that didn't seem to modify anything in the opt/ltsp/armhf/boot folder
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| 14:41 | <work_alkisg> You can ask non-ltsp questions in your distro channel...
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| 14:41 | You can ask them here too, but it's more likely to get answers there
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| 14:42 | <gbaman> I already have asked there :)
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| 14:43 | nothing yet
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| 14:43 | <work_alkisg> You can also ask in mailing list, google etc etc
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| 14:43 | (in the distro mailing list, not in the ltsp one)
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| 14:44 | <gbaman> i know all that needs done is to grab the most recent kernel files (the 3.2 ones I have are waaay out of date) and generate the ltsp initrd
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| 14:44 | is the only way to do this with ltsp-build-client ?
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| 14:45 | <work_alkisg> No, you only need to install the kernel in the chroot
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| 14:45 | You don't need to update anything and you don't need to run anything ltsp-related
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| 14:46 | <gbaman> on normal plain debian, how would you go about installing the kernel?
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| 14:46 | <work_alkisg> You would ask in #debian, not in #ltsp :)
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| 14:46 | <gbaman> am assuming it isnt a simple single command then :)
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| 14:46 | <work_alkisg> It is
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| 14:47 | I'm just trying to do some real work, so I'd prefer it if people ping'ed me only for ltsp questions, not for generic debian questions
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| 14:47 | <gbaman> ok
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| 14:47 | <work_alkisg> I don't even use debian in my systems...
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| 14:47 | (at least, not yet)
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| 14:47 | <gbaman> oh yea, vagrantc was the debian guy :)
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| 14:48 | <work_alkisg> Still, it doesn't matter...
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| 14:48 | I'm also using `sed`, and I don't like it if people ping me about sed questions... :)
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| 14:48 | <gbaman> ok, I will figure it out
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| 14:48 | <work_alkisg> That's why it's better to ask in the appropriate channels, _not_ ping specific people unless there's a reason to, and just wait patiently...
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| 14:48 | Or, use google, mailing lists, forums etc
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| 15:07 | <gbaman> Raspbian guys werent any help, rebuilding the OS
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| 15:11 | <effenberg> https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1308572
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| 15:11 | lol
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| 15:30 | <gbaman> ok work_alkisg I found them and have most recent versions, when I boot them though, it boots normally, not with ltsp. my guess being the LTSP scripts arent in the initrd
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| 15:31 | <work_alkisg> ls $CHROOT/etc/kernel/postinst.d/ltsp-update-kernels
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| 15:31 | LTSP has that hook that automatically puts its stuff into any initrd that you install
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| 15:36 | <gbaman> ltsp-update-kernels didnt work, it didnt make any change, just seemed to copy it to tftpboot folder
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| 15:36 | oops, didnt see one below
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| 15:37 | *comment
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| 15:37 | pis dont generate their own initrd it seems... they just grab it.. Yay..
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| 15:43 | think I might have figured it out
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| 16:26 | <gbaman> ok work_alkisg, did it, built an initrd for most recent pi kernel, with ltsp stuff in it
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| 16:26 | only to discover it does not have aufs...
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