Linux based Backup/Cloning Applications
Having already covered cloning and backup solutions for OSX and Windows, here are some Linux based solutions I use from time to time.
My favorite Open Source solution is by far Clonezilla. Clonezilla allows you to do bare metal backups/Images and restoration of partitions/volumes or whole drive duplication. It comes in 2 flavors, Clonezilla Live, and Clonezilla SE (server edition) for massive deployment supporting multicast. It supports ext2, ext3, ext4, reiserfs, xfs, jfs of GNU/Linux, FAT, NTFS of MS Windows, and HFS+ for the Mac OS. Providing maximum flexibilty for cloning GNU/Linux, MS windows and Intel-based Mac OS.