Backups with rsync
I am quite fond of an interesting GNU tool called rsync. This tool, originally written by Andrew Tridgell and Paul Mackerras, is superb for duplicating, backing up and updating file trees. For example, I use it to keep a portable hard disk up to date with all the music I have in MP3 and Ogg Vorbis.
As a tool for making backups, I recommend reading this article about incremental backups with rsync. Trully useful.
