Magento db & files Maintenance Script
#Instructions:
Place the following script inside the root direcotory of your magento
In the Add Cron Job section (cpanel), select Once a day from the Common Settings dropdown list.
In the Command field, enter the following line of code:
curl -s -o /dev/null http://yourwebsite.com/magento-cleanup.php?clean=log
and for files cleaning:
curl -s -o /dev/null http://yourwebsite.com/magento-cleanup.php?clean=var
It's a good idea to set the Email Address to something other than your username, otherwise your mail/new directory will fill up very quickly every time a cron job runs (assuming it produces output). You can leave it blank or use an actual email address.