http://www.netmass.com/Images/linux_backup.png
Hdup es una utility para hacer el backup muy simple de usar en Linux.

Instrucciones en inglès desde el sitio original para evitar problemas de traducciòn.
what is it?
Hdup2 is a backup utilty, it's aim is to make backup really simple. The backup scheduling is done by means of a cronjob. Is supports a include/exclude mechanism, remote backups, encrypted backups and split backups (called chunks) to allow easy burning to CD/DVD.
features

* 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.
* You need a Gnu tar version > 1.3.25

Hdup should run and compile on all Unixes out there. It does depend on Gnu tar for the backups. It also needs glib-dev if you compile it yourself. Also for building it you need Gnu Make.

You'll also need a recent tar version. Anything after 1.3.25 should work. Newer is better.
Backups
The scheme implemented by hdup2 is sometimes called the Grandfather-Father-Son scheme, Hdup just calls it: monthly-weekly-daily. Using this scheme it is wise to keep your backups for a minimum of one month.