1. Add the following line to /etc/crontab

*/1 * * * * root /etc/cron.minutely

2. Create the a file named /etc/cron.minutely

3. Paste the script in the /etc/cron.minutely file.
Here are some sample scripts:

#!/bin/bash
if tail -20 /var/log/apache2/error_log |grep "Segmentation fault"; then
echo "iPrint and Apache were restarted $(date '+%m/%d/%y %H:%M:%S')" >> /tmp/iPrintRestart.log
rcapache2 restart
wait
rcnovell-ipsmd restart
fi
==============

#!/bin/bash
ps -ef | grep ipsmd > /tmp/ipsmdCheck
if tail -2 /tmp/ipsmdCheck |grep "defunct"; then
echo "The Print Manager process (ipsmd) was defunct; Print Manager restarted $(date '+%m/%d/%y %H:%M:%S')" >> /tmp/iPrintRestart.log
rcnovell-ipsmd restart
fi

4. Change the rights on /etc/cron.minutely

chmod 755 /etc/cron.minutely

5. Restart cron
cd /etc/init.d
./cron restart
=========================================================

Example to delete apache logs greater than 5 days and to run that command every month.
1. Create a file named ApacheLogRotateDelete in the /etc/cron.monthly directory.
2. Paste the following into that ApacheLogRotateDelete file:
#!/bin/bash
find /var/log/apache2/* -mtime +5 -exec rm {} \;
3. Change the rights on /etc/cron.monthly/ApacheLogRotateDelete
chmod 755 /etc/cron.monthly/ApacheLogRotateDelete
4. Restart cron
cd /etc/init.d
./cron restart

NOTES:

Which files to delete:
The "find /var/log/apache2/* -mtime +5 -exec rm {} \;" line causes all files greater than 5 days old to be deleted. You can change the number of days by changing +5 to +10 for days, or +x for some other number of days.

How often to delete:
The instructions above cause the ApacheLogRotateDelete script to run every Month. You can have that run daily or weekly by using the cron.daily or cron.weekly directory.