On Friday 04 January 2002 12:17 pm, Douglas J Hunley wrote : > anyone know of any hacks/methods/etc to limit a particular userid to only > one login at a time? > > i.e. admin #1 logs in as root to do something, meanwhile admin #2 sshes > into machine as root to do something, but is not allowed to log in. > > just trying to keep people from tripping over each other ;) > > and skip the 'give em seperate accounts' and the 'use su' .. > I'm looking for other solutions thanks
I saw a kludge suggestion in the sco group regarding this. Involved adding some code the the login shell (.bashrc?) that tested if user was already logged in, and if so, would kick them with a message telling them root was already active on the system..this was written for SCO OpenServer, so not all may apply to linux, but anyway.. http://www.pcunix.com/SCOFAQ/scotec6.html#restrictlogin Or here it is: How do I restrict logins? For some reason, I often get requests to limit users to one login. I guess the people asking such questions have a reason for wanting to restrict logins this way. The only way to do it is to add a script to either /etc/profile or the particular user's .profile that tests to see if this user is logged in somewhere else. Something like this in /etc/profile will work: IAM=`who am i | cut -d" " -f1` COUNT=`w | cut -d" " -f1 | grep "^$IAM$" | wc -l` [ $COUNT -gt 1 ] && exit 0 Similar tricks can restrict a user to a particular tty: IAM=`who am i | cut -d" " -f1` TTY=`tty` [ $TTY != "/dev/tty07" ] && [ $IAM = "tony" ] && exit 0 And then there's always restricting login to root: put this in /etc/profile IAM=`who am i | cut -d" " -f1` [ -f /etc/nologin ] && [ $IAM != "root" ] && exit 0 When you need to restrict logins, just "touch /etc/nologin"; remove it when the need is over. You can restrict root to a particular device by adding a line like CONSOLE=/dev/tty01 to /etc/default/login (se "man M login"). _______________________________________________ Linux-users mailing list Archives, Digests, etc at http://linux.nf/mailman/listinfo/linux-users
