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Question

How do I logout from a computer using shell ?

Answer 1

+1 A:

Try restarting the display manager using one of the following, depending one which one you're using. You'll obviously have to have the proper permissions.

/etc/init.d/xdm restart
/etc/init.d/kdm restart
/etc/init.d/gdm restart

scompt.com 2010-06-08 10:35:00

xdm kdm not available on my Ubuntu 10.0

baltusaj 2010-06-08 10:37:29

That's probably not a good idea, as it will unceremoniously kill all X clients, possibly losing unsaved data in running apps :-(.

sleske 2010-06-08 10:38:04

@baltusaj: Ubuntu 10.04 uses `gdm` by default

Piskvor 2010-06-08 10:39:56

@baltusaj: That's because Ubuntu 10 uses `gdm` by default. Anyway, probably not a good solution (see my other comment).

sleske 2010-06-08 10:40:38

@sleske: As far as I can tell, that's exactly what the OP wants. @baltusaj: I've added gdm, which is what Ubuntu 10.0 uses.

scompt.com 2010-06-08 10:41:08

@scompt.com: Well, it does not *explicitly* say so. I find it very bad style to suggest solutions which can lead to data loss without at least mentioning that problem.

sleske 2010-06-08 10:43:24

@scompt.com Great. That's what i needed. @sleske It's fine to me. If the user does this without saving his data before, that's his headache. :P Thanks for letting me know though.

baltusaj 2010-06-08 10:43:52

Answer 2

+1 A:

It's a bit of a hack, but the way that screen's power detach does this is to determine its parent pid and send it a SIGHUP. (Clarification: This closes only the shell, so only works if you're running from a console - not a graphical login - so may not be what you're looking for.)

crazyscot 2010-06-08 10:35:29

Answer 3

+2 A:

Your question is a bit vague. Are you trying to log out of a graphical session of a desktop environment (such as KDE/Gnome), as if the user clicked on "log off"?

Then you need to find out if/how the desktop environment supports scripting to log out. On KDE for example you can use kquitapp.

sleske 2010-06-08 10:37:13

Yes exactly. I want to replicate the code working behind the Logout button in my ubuntu (GNOME).

baltusaj 2010-06-08 10:46:26

Do you know what can I use for GNOME?

baltusaj 2010-06-08 10:49:03

You could try gnome-session-save: http://linux.die.net/man/1/gnome-session-save

sleske 2010-06-08 11:33:07

Answer 4

+5 A:

I think this does the job:

gnome-session-save --logout

Also, take a look at the --help output, maybe you want to use the --force-logout option.

Usage:
  gnome-session-save [OPTION...]

Help Options:
  -h, --help               Show help options
  --help-all               Show all help options
  --help-gtk               Show GTK+ Options

Application Options:
  --logout                 Log out
  --force-logout           Log out, ignoring any existing inhibitors
  --logout-dialog          Show logout dialog
  --shutdown-dialog        Show shutdown dialog
  --gui                    Use dialog boxes for errors
  --display=DISPLAY        X display to use

Daniel M. 2010-06-08 10:56:20

This page: http://linux.die.net/man/1/gnome-session-save says, it's --kill, not --logout, but I haven't tried.

Boldewyn 2010-06-08 10:58:53

@Boldewyn: On my Gnome, a popup opens when I use --kill, maybe not what is wanted for scripts. I then ran gnome-session-save --help, which lists the --logout option.

Daniel M. 2010-06-08 11:04:25

thanks. That did what I needed.

baltusaj 2010-06-08 11:10:14

@Daniel M.: Just checked the man page on my Ubuntu machine, too: --kill and --silent are deprecated, so my comment from above is irrelevant, the linked man page is outdated. (I +1'ed your answer before anyway. Thanks for pointing us to gnome-session-save)

Boldewyn 2010-06-13 09:26:51

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How do I logout from a computer using shell ?

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