Clonezilla is a system administration Linux distro that enables bare metal backup and recovery of PCs. It can clone a single PC using the Clonezilla Live edition or multiple PCs simultaneously using the Clonezilla Server edition.
“grml is a Debian-based system administration distro, providing more than 1700 software packages. “You’ll get sysadmins favourite tools, security- and network-related software, data recovery- and forensic-tools, LaTeX, many editors, shells, and of course many texttools.”
SystemRescueCd is a Linux distro designed for repairing your system and your data after a crash. It ships with dozens of software packages used to carry out admin tasks on PC, and it’s usable on x86, SPARC, and PowerPC (Mac) architectures.
Parted Magic is a Linux-based distro designed mainly for disk partitioning, using programs like VisParted, while featuring other useful programs (e.g. Partition Image, TestDisk, fdisk, sfdisk, dd, ddrescue, etc.) and an excellent set of documentation to benefit the user. An extensive collection of fileystem tools are also included.