Clonezilla

Clonezilla is an open-source suite of disk cloning, disk imaging and system deployment utilities. Clonezilla Server Edition uses multicast technologies to deploy a single image file to a group of computers on a local area network. Clonezilla was designed by Steven Shiau and developed by the NCHC Free Software Labs in Taiwan.

Clonezilla is used to deploy operating systems to computers by imaging a single computer and then deploying that image to one or more systems. It integrates several other open-source programs to provide cloning and imaging capabilities.

Clonezilla works by copying used blocks on the storage device (i.e. SATA SSD, HDD or NVMe SSD). It is intended to support a bare-metal deployment of an operating system by booting from a preinstalled live environment. The preinstallation environment can be booted from a USB flash drive, CD/DVD-ROM or Android mobile phone. It uses Partclone, Ntfsclone, Partimage, or dd to image the drive either over the network or to a locally-attached hard disk drive.