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05:23 | <Zeut> Hello, I have LTSP up and running on Ubuntu 12.04, and I'm using one of the lts.conf SCREEN_xx variables to have one tty execute xfreerdp to connect to a windows terminal server. Question: How do I get a USB drive plugged into the LTSP client to show up in windows?
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06:00 | <alkisg> Zeut: I think the LTSP way is to install ltspfsd in the chroot, search irclogs.ltsp.org, I think Gadi mentioned an exact how to
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06:01 | The non-LTSP way would be to have an udev hook use udisks to automatically mount any usb sticks the user inserts
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13:18 | <mors> He
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14:45 | <markit> question: if I have a file in /home, that is NFS mounted, that points to /var/whatever that is in NBD, will I have double access? I mean an hit to NFS, then it finds that is linked to /var and an access with NBD?
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15:32 | <markit> hi alkisg :)
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15:33 | I've solved the pulseaudio problem, that is a phonon problem, and I did a dirty trick
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15:33 | I remove the list of audio devices at user login
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15:35 | also I've pointed to this kde "bug": https://bugs.kde.org/show_bug.cgi?id=211416
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15:36 | seems that kde looks for TONS of files after login, so nfs is in troubles
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15:43 | <alkisg> markit: nfs? or sshfs?
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15:43 | nfs generally behaves much better than the default sshfs
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15:43 | But you need to set it up on the server, and put an FSTAB_1=xxx line in lts.conf
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15:43 | <markit> nfs, but I'm digging right now .kde files and I've found that it does cache a lot
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15:44 | I use NFS_HOME
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15:44 | <alkisg> Did you run `mount` and verify it's mounted?
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15:44 | (on the fat clients...)
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15:44 | <markit> so if cache is really done, that explains why it takes a LOT of time the first time ever the user logins
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15:44 | <alkisg> (NFS_HOME is deprecated btw, in favor of FSTAB_x)
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15:45 | <markit> FSTAB_1=/home ?
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15:45 | <alkisg> The whole /etc/fstab line
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15:45 | Google for "mount nfs fstab"
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15:45 | (trying to make things more ltsp-agnostic...)
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15:46 | You could also disable nfs locks, IF your users never open the same file for writing...
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15:47 | <markit> sorry, was on the phone... let me read... the whole fstab?
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15:47 | I've no entry in /etc/fstab for the server home dir
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15:47 | or we are mixing stuff?
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15:48 | mount confirms that home is nfs, and /srv is fuse-ssfh
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15:48 | <alkisg> Imagine you have a standalone client and want to mount NFS /home from the server, what will you do?
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15:48 | You'll write an /etc/fstab line on that client
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15:48 | <markit> I see, thanks
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15:48 | <alkisg> Well, you do the same for LTSP now, just in line FSTAB_1
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15:49 | <markit> btw, if I have a file in /home, that is NFS mounted, that points to /var/whatever that is in NBD, will I have double access? I mean an hit to NFS, then it finds that is linked to /var and an access with NBD?
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15:49 | <alkisg> Symlink or hardlink?
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15:49 | <markit> hard to tell :)
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15:49 | let me check
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15:50 | lrwxrwxrwx 1 insegnante insegnante 28 ago 31 16:35 cache-gnuserver -> /var/tmp/kdecache-insegnante
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15:50 | <alkisg> ln -s => symlink. Symlinks can cross file systems, so if /home/symlink points to /var/whatever, then it's the same as issuing `cat /var/whatever` directly on the client
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15:50 | ln => hardlink, cannot cross file systems, i.e. that one will use the server file system
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15:50 | Hardlinks are rarely used, most are symlinks
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15:51 | (like the one you posted)
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15:51 | <markit> :)
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15:51 | <alkisg> In sshfs, there's "follow symlinks" which follows the link on the server
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15:51 | <markit> but in any case it looks for /home through NFS, and then changes FS and accesses with NBD
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15:52 | <alkisg> So in that case, you'd be using the server's /var/tmp/kdecache
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15:52 | Right, that's what symlinks do
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15:52 | But it's not NBD
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15:52 | It's tmpfs
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15:52 | NBD is read only
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15:53 | <markit> but if in the fat I do a mount | grep var I have nothing
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15:53 | <alkisg> The whole / is tmpfs
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15:54 | <markit> ah
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15:54 | <alkisg> Actually, tmpfs + squashfs (nbd) + overlayfs
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15:54 | So all your changes are saved in ram
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15:55 | <markit> so if I login in a fat client, the server /var/tmp/kdecache is ignored?
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15:55 | <alkisg> You get the server's /opt/ltsp/i386/var/tmp/kdecache as a starting point, and any changes there are saved in RAM, in the tmpfs
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15:56 | <markit> seems not since I've entries like cache-ltsp101 -> /var/tmp/kdecache-insegnante
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15:56 | <alkisg> Where is "cache-ltsp101"? Under $HOME?
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15:57 | <markit> ehm, yes... so only the symlink is created
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15:57 | <alkisg> Yup
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15:57 | That's a good thing, it means you're not using NFS for the cache
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15:57 | <markit> but the /var/tmp/kdecache-insegnante not? (and if it is, is because I've logged into the server)
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15:57 | <alkisg> So since you're using a tmpfs, it's much faster than it would be if you were using NFS
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15:58 | <markit> alkisg: yep, but the bad thing is that KDE does a lot of work to find files, stores results in cache but fat client will discard it
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15:58 | <alkisg> Then try sshfs with FOLLOW_SYMLINKS=True
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15:58 | If it needs persistence across logins/reboots, that is...
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15:59 | Or write another FSTAB line
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15:59 | <markit> :)
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15:59 | <alkisg> markit: du -sh /var/tmp/kdecache-insegnante?
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15:59 | How much stuff is there anyway?
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15:59 | <markit> and export through NFS, but they say is slower for that kind of work than sshfs
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16:00 | is 109MB
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16:00 | <alkisg> Woah
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16:00 | <markit> but the problem, as afar as I understand from the bug
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16:00 | <alkisg> Why isn't it using ~/.cache???
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16:00 | <markit> is that KDE tries to find THOUSANDS of files
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16:00 | <alkisg> markit: let's get that from the start, where's the initial entry under $HOME?
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16:01 | Just change that one, to point under $HOME again...
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16:01 | So that each user cache is inside his own home folder
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16:01 | Whatever that is, sshfs, nfs...
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16:01 | <markit> ls -l ~/.kde has cache-gnuserver -> /var/tmp/kdecache-insegnante
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16:01 | <alkisg> Right, so change that
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16:01 | <markit> one entry for each hostname I had loggin it (crazy?)
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16:01 | cache-ltsp100 -> /var/tmp/kdecache-insegnante and cache-ltsp101 -> /var/tmp/kdecache-insegnante
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16:02 | so not a single "root" to change, sigh
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16:02 | <alkisg> This is where login scripts come in handy
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16:02 | <markit> :)
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16:02 | I'm questioning the reasoning behind this behaviour
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16:03 | <alkisg> You can e.g. create one under /etc/X11/Xsession.d, or from pam.d, or maybe even from /etc/xdg/autostart
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16:03 | <markit> I think that development is more and more unaware of multiuser needs
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16:03 | <alkisg> Do question it, and report that you're annoyed :)
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16:03 | <markit> it's going to be "desktop centric" only
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16:03 | lol
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16:03 | back to the easy part... FOLLOW_SYMLINKS=True can't help?
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16:03 | <alkisg> Or, take care to mount /var/tmp/kdecache-$USERNAME from an LDM login script
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16:03 | Sure, it can
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16:04 | <markit> btw, since you have a voice in ltsp development
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16:04 | I've found that the scritp you put under Xsession.d are named strangely
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16:04 | the "rule" in doc says
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16:04 | <alkisg> markit: you can also create a symlink from /var/tmp/kdecache-$USER back to /home/$USER/.cache ...
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16:04 | <markit> number + package_explaination
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16:05 | <alkisg> So that's just a single point to change
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16:05 | <markit> instead you have 2 also different among them
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16:05 | 40-ltsp-server and 80_ltsp-sound
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16:05 | (phone, brb)
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16:05 | <alkisg> Which dir are you talking about? /etc/X11/Xsession.d/ ? That's not an LTSP dir, it's an X dir
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16:06 | Also, I don't know anything about 40-ltsp-server
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16:06 | Nor about 80_ltsp-sound, the debian ltsp we're using doesn't have those
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16:07 | <markit> ah, it's kubuntu....
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16:07 | extend and improve ;P
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16:07 | <alkisg> In 12.10 they're probably removed in Ubuntu as well
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16:07 | They were remains from very old LTSP implementations...
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16:07 | <markit> I've to run in a short time, I take note of this conversation and do some tests later
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16:07 | <alkisg> Sure, bb
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16:07 | <markit> once again I've to tell you that without your help I would never be able to deploy LTSP
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16:07 | so thanks once again
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16:07 | <alkisg> That's a bad thing :)
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16:08 | It means LTSP needs more work!
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16:08 | <markit> really, I feel so lost
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16:08 | well, part of the problems is that I want to use KDE, but is not tested so much in ltsp
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16:08 | so "my foult"
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16:08 | other is that dev seem not to care about multiuser
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16:08 | <alkisg> Try to send patches upstream so that it's better supported in the next ltsp/kde versions
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16:09 | <markit> and last but not least, I'm not very found in GNU/Linux, just "average"
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16:09 | <alkisg> bbl :)
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16:09 | <markit> yep, but just figure out what is wrong is really hard for me
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16:09 | I need to improve my skill on this
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16:09 | see you later :)
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17:40 | <alkisg> !gnome-session
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17:40 | <ltsp> Error: "gnome-session" is not a valid command.
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17:40 | <alkisg> !gnome-classic
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17:40 | <ltsp> gnome-classic: To select gnome-classic as your default session, install the gnome-session-fallback package, and put this line in your lts.conf: LDM_SESSION="gnome-session --session=gnome-classic"
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19:52 | <markit> after that I modify lts.conf, do I have to restart any service? Or just a matter of reboot the client?
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20:04 | <markit> hi alkisg, I've added SSH_FOLLOW_SYMLINKS=True but in host (server) /var/tmp/kde* I've no the kde-cache dir
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20:04 | is something more I have to do? restart ssh-server?
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20:05 | <alkisg> markit: disable nfs
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20:05 | <markit> and isn't that the default value anyway?
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20:05 | <alkisg> No, for /home it isn't
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20:05 | <markit> ah, so I should mount home as sshfs and not nfs to have it work? bad thing indeed
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20:06 | <alkisg> Not too bad though, if it saves you 180mb per login
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20:06 | <markit> ok, let's try an measure
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20:07 | <alkisg> It's even easier to setup (since it's the default)... for 12.04 we're trying to follow sshfs as the default - we were using nfs in 10.04, but the relative symlinks problems seem to have gone with /home == not follow symlinks and /other-dirs == follow symlinks
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20:09 | <markit> mm I've an error, a xterm window after login telling that "Call to lnusertemp failed (temporary directory full?)"
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20:10 | to "disable NFS" I just commented out HOME_NFS in lts.conf, correct?
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20:10 | <alkisg> What group does /var/tmp/kde* belong in?
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20:11 | <markit> well /var/tmp/ drwxrwxrwt 4 root root, and the subdir kde* created (from server) belong to the user
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20:11 | i.e. drwx------ 7 insegnante insegnante 4096 ago 31 19:13 /var/tmp/kdecache-insegnante
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20:11 | I could remove .kde in the home and see what happens
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20:12 | <alkisg> You have a shell in that xterm window?
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20:12 | Try `locate lnusertemp`, and run it manually...
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20:13 | <markit> is not a xterm, just an X message, I've the "Okey" button and then I'm back to ldm login
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20:14 | I can try with follo_symlynk false and see it goes away
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20:14 | <alkisg> You can also try with SCREEN_07=xterm
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20:14 | <markit> mmm same error
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20:15 | <alkisg> Eh?
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20:15 | That doesn't sound right... so KDE with sshfs doesn't work at all?
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20:15 | <markit> seems so, but sounds impossible
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20:15 | or maybe I've never tried it as FAT before
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20:15 | I can try thin and see what happens
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20:16 | <alkisg> Nah... no remote file system there
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20:16 | <markit> ehm, of course :)
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20:16 | <alkisg> Try SCREEN_07=xterm, and troubleshoot it from there
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20:16 | E.g. run lnusertemp manually
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20:17 | <markit> what should happen now? I've the same error/window
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20:18 | <alkisg> You shouldn't see ldm at all
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20:18 | Check your lts.conf for errors
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20:18 | <markit> ok, I forgot to turn off the pc, maybe is that
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20:19 | <alkisg> Every time you change lts.conf you need to reboot the client
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20:20 | Also googling for lnusertemp shows some possible solutions, to try in that xterm
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20:34 | <markit> lnusertemp is not a command I can run from xterm, not present
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20:36 | is it correct that mount | grep home results nothing?
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20:40 | <alkisg> (11:34:17 μμ) markit: lnusertemp is not a command I can run from xterm, not present ==>
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20:40 | (11:12:44 μμ) alkisg: Try `locate lnusertemp`, and run it manually...
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20:40 | It might not be in the path
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20:40 | markit: run cat /proc/mounts and put the result to pastebin
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20:41 | markit: there's also "LDM_DEBUG_TERMINAL" or something that opens an xterm _after_ login, because that xterm now is before login
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20:42 | LDM_DEBUG_TERMINAL=True
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20:43 | <markit> http://paste.ubuntu.com/1180368/
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20:46 | I've found the command in 2 places, one /usr/lib/kde4... ad the other /rofs/usr/lib/kde4..
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20:46 | I've run with option tmp and option chace, runs without complain
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20:47 | I've also tried with a brand new user, same issue
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20:49 | now I try LDM_DEBUG_TERMINAL=True
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20:51 | ok, home is there and fuse.sshfs
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20:52 | lnusertemp can be executed there too
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20:52 | df -h gives me only /rofs as full
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20:53 | that is nbd block device
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20:54 | <alkisg> aufs? Which version are you running?
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20:54 | 12.04 or older?
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20:55 | 12.04 should be using overlayfs by default
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20:56 | <markit> 12.04
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20:56 | <alkisg> And the chroot is 12.04 as well?
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20:56 | <markit> I've seen that in the xterm I'm at /, and has been created .kde and .config there
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20:56 | yes, 12.04, is a brand new installation
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20:57 | <alkisg> Something is wrong then, it should be using overlayfs, not aufs
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20:57 | But anyway lets move on
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20:57 | Did you say /.kde ? In / ?
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20:57 | <markit> yes, maybe created by lsusertemp? I can remove and re-try
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20:57 | <alkisg> Ah ok no, no need
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20:58 | markit: whoami
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20:58 | Is that xterm root xterm?
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20:58 | <markit> yes, I'm root there
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20:58 | <alkisg> Then switch to the user account, su - username
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20:58 | And run lnusertemp from there
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20:58 | <markit> su authentication failed
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20:59 | <alkisg> id username
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20:59 | The user is there, right?
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20:59 | <markit> yes
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20:59 | uid, gid and groups
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20:59 | <alkisg> sudo -u username bash -l
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21:00 | <markit> I'm not a sudoer, refused
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21:00 | <alkisg> root is not a sudoer?
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21:00 | <markit> btw, the last is "L" or "1" (one?)
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21:00 | <alkisg> L
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21:00 | <markit> root is, but username=mmenardi that is not
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21:00 | ops
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21:00 | I'm not root anymore
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21:00 | <alkisg> OK, try lnusertemp
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21:01 | <markit> su - mmenardi gave the authenticatino error, but I become username regardless ($)
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21:02 | ok, errors about "can't create links"
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21:02 | <alkisg> strace -e trace=file lnusertemp
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21:03 | i.e. we want the names of the links it tries to create... see why it has no access while it should
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21:04 | <markit> cannot create links from /home/username/.kde/tmp-ltsp101 to /tmp/kde-username
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21:04 | <alkisg> /tmp or /var/tmp ?
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21:05 | Try manually, ln -s
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21:05 | <markit> is /tmp
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21:05 | <alkisg> And run some `ls -l` there to see the permissions
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21:08 | <markit> so I should create ln -s /tmp/kde-username to /home/username/.kde/tmp-ltsp101
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21:08 | creation of symlink failed: Operation not permitted
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21:09 | mmm I've 2 strange things there
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21:09 | the first has permissions: ???????? ? ? ? cache-ltsp101
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21:09 | the second, same stuff but name is tmp-ltsp101
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21:09 | never seen all those ????? before in a file system
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21:11 | in the host I seen instead: lrwxrwxrwx 1 mmenardi mmenardi 26 set 1 22:25 cache-ltsp101 -> /var/tmp/kdecache-mmenardi
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21:12 | <alkisg> That means it has no access to read the permissions, e.g. a different user trying to access an sshfs mount
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21:12 | Anyway, gotta go, good luck with it! :)
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21:12 | <markit> but in .kde there are 2 other dirs that I can see properly
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21:12 | alkisg: ok, thanks a lot!
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