#Aide Crontab # ┌────────── minute (0 - 59) │ ┌──────── hour (0 - 23) │ │ ┌────── day of month (1 - 31) │ │ │ ┌──── month (1 - 12) │ │ │ │ ┌── day of week (0 - 6 => Sunday - Saturday, or 1 - 7 => Monday - Sunday) │ │ │ │ │ ↓ ↓ ↓ ↓ ↓ * * * * * command to be executed 58 23 * * * /sbin/iptables-save > /etc/firewall.iptables-cron 2>&1 ##### Hope it will help ;)