# In order to run pisg in crontab, then do 'crontab -e' as a normal user,
# and insert a line like this:

10,20,30,40,50,60 * * * * /path/to/pisg.pl

# This will make pisg run every 10 minutes, or you could do it every hour
# by doing this:

* 0 * * * /path/to/pisg.pl