Kaisen Linux is a rescue system based on the Debian GNU / Linux distribution. It is a complete operating system whose originality is to provide a set of tools dedicated to system administration and covering all the needs for diagnosing and dealing with faults or failures of an installed system and its components. The most important system tools are available. It is thus possible to modify the partitioning of hard disks, to save the data or the system, to repair the file system and to recover lost data, or to reactivate the boot manager, to carry out a deep formatting of a hard drive and many other things !