[K12OSN] Multiple logins ???
Martin Woolley
sysadmin at handsworth.bham.sch.uk
Tue Sep 21 12:44:16 UTC 2004
On Tuesday 21 Sep 2004 12:48 am, norbert wrote:
> Hi,
>
> i'd like to thank everyone for all the good tips, now the massive work
> starts.
>
> Now how can we prevent the same user from logging in to different
> workstations without "killing" the first instance ?
>
> Please all suggestions are welcomed, this has become a real problem!!!
We used to do this on AIX boxes; I haven't tried this under Linux but there it
*should* work with some changes to paths - YMMV
Some code to prevent multiple logins (for /etc/profile or .profile)
# This user is only allowed a single login instance
tty=`/usr/bin/tty` # Get tty to test for multiple login
if /usr/bin/ps -u $LOGNAME | /usr/bin/grep -v UID | /usr/bin/grep -v
"${tty##/dev/}"
then
/usr/bin/cat <<-EOM >&2
You already have an active session on this system and you are
allowed a single session. This session will now be closed.
EOM
wait
exit
fi
--
Regards
Martin Woolley
ICT Support
Handsworth Grammar School
Isis Astarte Diana Hecate Demeter Kali Inanna
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