rsnapshot

An excellent tutorial on how to configure secure remote backups using rsnapshot and root ssh. Includes details on all the steps necessary to secure your root ssh keys and limit access.

rsnapshot is a filesystem backup utility based on rsync. Using rsnapshot, it is possible to take snapshots of your filesystems at different points in time. Using hard links, rsnapshot creates the illusion of multiple full backups, while only taking up the space of one full backup plus differences. When coupled with ssh, it is possible to take snapshots of remote filesystems as well.