Clonezilla - Open Source Tools for System Administrators
Clonezilla is an open source clonesystem that supports unicasting in the single client edition and multicasting in the server edition that can clone up to 40 computers simultaneously. Reminiscent of Norton Ghost, Clonezilla comes with a very basic interface, but is fast, very efficient and can be used across small and large networks. A wide variety of file formats for GNU/Linux, Windows, Mac OS X (Intel), FreeBSD, NetBSD, and OpenBSD on 32-bit and 64-bit systems is supported.
Supported OS: Linux (Debian, Ubuntu)