backup system for small systems and networks

 These are the backup scripts used by chiark.greenend.org.uk and other
 systems belonging to the Sinister Greenend Organisation. Features:
  * Suitable for single systems and small networks.
  * Reasonably simple; they do what you tell it to.
  * Hard failures when individual systems fail, to encourage fixing !
 If you have a larger site you may wish to look at Amanda.