Backup

Backup systems.

Recommended read
Backing up Linux and other Unix(-like) systems

Free Backup Software

dump & restore
Works only on ext2/ext3 filesystems.

Script automation
dump-backup script, and Remote backup with dump and ssh.

Rdiff-backup
Rdiff-backup

Rdiff-backup at backupcentral

Rsnapshot
Rsnapshot

Rsnapshop at backupcentral

Rsnapshop at gentoo-wiki

Bacula
Bacula

Bacula Advantages

MySQL
How to make database backup: MySQL.