Someone

SHELL=/bin/sh
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
MAILTO=root

# m h dom mon dow user  command
#17 *   * * *   root    run-parts --report /etc/cron.hourly
#25 6   * * *   root    run-parts --report /etc/cron.daily
#47 6   * * 7   root    run-parts --report /etc/cron.weekly
#52 6   1 * *   root    run-parts --report /etc/cron.monthly
#
#
*/15 * * * *    root    run-parts --report /etc/cron.hourly && run-parts --report /etc/cron.daily && run-parts --report /etc/cron.weekly && run-parts --report /etc/cron.monthly
0  *  * * *     root    rm -f /var/spool/cron/lastrun/cron.hourly
0  5  * * *     root    rm -f /var/spool/cron/lastrun/cron.daily
0  4  * * 1     root    rm -f /var/spool/cron/lastrun/cron.weekly
0  3  1 * *     root    rm -f /var/spool/cron/lastrun/cron.monthly