hdup is a little, spiffy, backup tool.

Features are:
- simple to use
- small and versatile backup program
- support for incremental backups
- support for backups over the network (with ssh)
- support for network restore (with ssh)
- support for encrypted backups (using mcrypt, gnupg)
- support for split up archives (called chunks)
- support for .nobackup files (to exclude certain directories)
- flexible regular expression based include/exclude mechanism
- designed to be run from cron

WWW: http://www.miek.nl/projects/hdup2