dear all
i am using fedora 4 for bash scripting
i have a postfix mail server . my script run on this server

i want to make a sript which will manage server automatically
for this a make script which will mail me if queue greater the 500
as:

#!/bin/bash
qshape|head|grep TOTAL|awk '/.*/ {print $2}' >value
i=`cat value`
if [ "$i" -gt 500 ];
then
mail -s "`date` " cs_dhiman@yahoo.co.in < output
cp /etc/postfix/main.cf.bk /etc/postfix/main.cf
postfix reload
fi

this works ok .
the cp line in script will place a file which has default_process limit as 25
now i want that after 5 min. the main.cf.ok will replace the main.cf

so that the default _process limit will become 700 .( as in normal mode)

Question is:
what type loop will help me to calculate 5 min time after the if condition comes true ...so that i can put the orignal file...

I guess you could use the sleep command. From the man page:

Personally I'd look at doing this in a proper monitoring system, such as Nagios.
Nagios can run scripts as event handlers - it can run a script once when your mail queue goes over 500, then keep checking at regular intervals, and run another script when it falls back below 500.

You could even do it at 2 levels - so if the mail queue is between 400 and 500, then lower the process limit to 500, if it's over 500, lower it to 25 etc, if it falls back below 400 then raise it to 700 again, or whatever.

But then that's just me ;-)

Thanks for reply

i did it with the script for all of u is :

#!/bin/bash
TIME_LIMIT=300
INTERVAL=1
while [ "$SECONDS" -le "$TIME_LIMIT" ]
do
if [ "$SECONDS" -lt 300 ]
then
units=second
else
[my script path ]
fi
sleep $INTERVAL
done
exit 0


this works ok