rsnapshot is a filesystem snapshot utility for making backups of local and remote systems. It leverages rsync and hard links to create efficient incremental backups, allowing users to maintain multiple backups without consuming excessive disk space.
Clonezilla is a partition and disk imaging/cloning program similar to True Image®. It saves and restores only used blocks in hard drive. Two types of Clonezilla are available, Clonezilla live and Clonezilla SE (Server Edition).
rsnapshot is a filesystem snapshot utility based on rsync. rsnapshot makes it easy to make periodic snapshots of local machines, and remote machines over ssh. The code uses hard links whenever possible, to greatly reduce the disk space required.