Clonezilla is a free disk cloning, disk imaging, data recovery, and deployment computer program.
It enables a user to clone a single computer's storage media, or a single partition on the media, to a separate medium device. The cloned data can be saved as an image-file or as a duplicated copy of the data. The data can be saved to locally attached storage device, an SSH server, a Samba server, or an NFS file-share. The clone file can then be used to restore the original when needed.