“Clonezilla is an OpenSource clone system (OCS) solution with unicasting and multicasting.
Clonezilla, based on drbl, partclone and udpcast, allows you to do bare metal backup and recovery. This package provides Clonezilla SE (server edition) which is for massive deployment: it can clone many (40 plus!) computers simultaneously.
Clonezilla saves and restores only used blocks in the harddisk. This increases the clone efficiency. At the NCHC’s Classroom C, Clonezilla SE was used to clone 41 computers simultaneously. It took only about 10 minutes to clone a 5.6 GBytes system image to all 41 computers via multicasting.”
see Debian — Details of package clonezilla in sid
Amen! I have used Clonezilla many times as a download from the web for a “live CD” or USB drive. Now it’s even easier; any server running Debian GNU/Linux will soon be able to install Clonezilla via APT. Assuming you can allow network booting on your LAN, you can have clients boot PXE and load software by DRBL (Diskless Remote Boot Linux) and copy disk images from the server.
With this tool, openSSH and APT, a system administrator has plenty of powerful tools for setting up and administering a GNU/Linux system although Clonezilla can be used to set up that other OS too. This is a fine addition to Debian GNU/Linux.