Killing all users via cron

Hello, Redhat 6.2 - 7.2  
Is there a built in way of having the system log off all users (telnet) at say midnight? If not where could i find a script that would do this for us? Thanks
robidsAsked:
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liddlerCommented:
Untested, by the line below should sent a kill -9 (the KILL signal) to PIDs (column 2, via awk) of any bash shell processes), not sure whether this would afect any other processes runing via a bash shell.

kill -9 `ps -aux |grep bash|awk '{print $2}'`

to do it via cron
0 0 * * * /usr/bin/kill -9 `ps -aux |grep bash|awk '{print $2}'`

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paulqnaCommented:
I would not recommend to kill all bash processes, that will not guarantee all "telnet" users are gone, or lost of data due to killing system scripts/apps.

I would suggest to restart the telnet (inetd) service from cron.

What do you use, xinetd ?
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liddlerCommented:
Stopping telnetd / inetd doesn't kill any current sessions, it just prevents new ones.
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robidsAuthor Commented:
Stoping xinetd does not drop the telnet session. it only prevents new logins
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robidsAuthor Commented:
You were right that it would not get the bash applications running under it, but by simply changing to
 kill -9 `ps -aux |grep pts/|awk '{print $2}'`

This got every thing associated to the telnet. I have still to test more. Also, I had to suppress errors on cron not being able to find all processes since things die in different orders.
Thanks
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