Backup de directorios (tar)

#!/bin/bash
mkdir /root/backups
tar /home/ /etc /var -cjvf /root/backup-`date +%F`.tar.bz2
md5sum /home/backups/backup.tar.bz2 > md5-`date +%F`.lst

Agregamos una tarea programada a nuestro cron:

0 1 * * * tar /home/ /etc /var -cjvf /root/backup-`date +%F`.tar.bz2