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From: Joachim Gann on 6 May 2008 12:43
omie wrote:
> I need to figure out how long does it take for my ssh client to
> terminate due to inactivity. I wanted to do a script that when the
> ssh session is provoked it sends a date command to the screen and then
> every 10 minutes of inactivity sends the output of the date command to
> the screen and "you have been inactive for 10 minutes" and then sleeps
> for 10 minutes again and date output and you have been inactive for 20
> minutes and so on and so forth so the user know how long of inactivity
> they have.
>
> Can someone please help me I dont know how to echo date to the
> terminal. I would appreciate the advice.
>


I doubt that your ssh client times out. It could be the shell child
process (see TMOUT environment variable for interactive sessions) or the
underlying network: your OS might close idle TCP connections after a
timeout (AIX defaults to 2h idle tcp connection timouts) or a firewall
between client and server hosts could do the same.

you could do something like this:
(note that the interval is increased by ten minutes each turn, that's
because the data transmitted by the echo command will restart any
network related timeout)

ssh server
let i=600
while true
do
sleep $i
echo succesfully slept $i seconds
let i=$i+600
done


Joachim
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