Cron job to run every other Sunday 2

[austin123]

Hi,
Can anyone help me, we have an (e10k sol8) and I need to set up a cronjob that runs every other Sunday at 2am.
Is there any simple way to do this?
Cheers,
Austin.

 

[mdet]

Just read the man page (man crontab).

 

[z28sarefun]

I don't think there is using crontab alone. Try using some sanity checking/logic in your script. You could do something like have a file with a 1 or a 0 in it and have the script run every sunday, if it's a "1" it runs the process and changes it to "0", if it's a "0" it doesn't run the process but changes the value to "1". Something like that should work.

HTH
Brian

 

[bnothos]

Here's a link I found a while back that actually does a very nice job explaining cron job scheduling. Beats the heck outta the man pages:

http://www.activewebhost.com/support/manual/cron_tab.htm

 

[austin123]

Thanks for the replies, what I ended up doing was :-

WK=`/usr/bin/date +%U`
WKNO=`/usr/bin/expr $WK % 2`
if [ $WKNO -eq 1 ]; then
echo "No back up this week - once a fortnight only."
exit 0
fi

This seems to work fine!,
Cheers.