# cat /etc/crontab
SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin
MAILTO=root
HOME=/

# run-parts
01 * * * * root run-parts /etc/cron.hourly
02 4 * * * root run-parts /etc/cron.daily
22 4 * * 0 root run-parts /etc/cron.weekly
42 4 1 * * root run-parts /etc/cron.monthly

# ls -l /etc/cron.daily/
total 64
-rwxr-xr-x 1 root root  133 Jan  9  2007 00webalizer
-rwxr-xr-x 1 root root  379 Mar 28  2007 0anacron
-rwxr-xr-x 1 root root  180 Dec  2 00:38 logrotate
-rwxr-xr-x 1 root root  418 Jan  6  2007 makewhatis.cron
-rwxr-xr-x 1 root root  137 Mar 14  2007 mlocate.cron
-rwxr-xr-x 1 root root 2181 Jun 21  2006 prelink
-rwxr-xr-x 1 root root  114 Nov 11  2007 rpm
-rwxr-xr-x 1 root root  290 Mar 15  2007 tmpwatch

# ls -l /etc/cron.weekly/
total 16
-rwxr-xr-x 1 root root 380 Mar 28  2007 0anacron
-rwxr-xr-x 1 root root 414 Jan  6  2007 makewhatis.cron

# ls -l /etc/cron.monthly/
total 8
-rwxr-xr-x 1 root root 381 Mar 28  2007 0anacron