rdiff-backup is a tool used to backup your files. It can be run on a variety of *nix ports, but this howto will assume debian based linux. Note: run the commands in this howto as root unless told otherwise.

BackupPC is a high-performance, enterprise-grade system for backing up Linux and WinXX PCs and laptops to a server's disk. BackupPC is highly configurable and easy to install and maintain.