Relax-and-Recover (abbreviated rear) is a highly modular
disaster recovery framework for GNU/Linux based systems,
but can be easily extended to other UNIX alike systems.
The disaster recovery information (and maybe the backups)
can be stored via the network, local on hard disks or
USB devices, DVD/CD-R, tape, etc. The result is also a
bootable image that is capable of booting via PXE,
DVD/CD and USB media.
Relax-and-Recover integrates with other backup software
and provides integrated bare metal disaster recovery
abilities to the compatible backup software.
Warning for users who like to upgrade Relax-and-Recover:
Users who already use it must re-validate that their
particular disaster recovery procedure still works.
See in particular "Version upgrades" at
Additionally when you already use Relax-and-Recover and
you upgrade software that is related to the basic system
(e.g. kernel, storage, bootloader, init, networking) or
you do other changes in your basic system, you must also
re-validate that your particular disaster recovery
procedure still works for you.
You must test in advance that it works in your particular
case to recreate your particular system with your
particular recovery medium and that the recreated system
can boot on its own and that the recreated system with
all its system services still work as you need it in your
You must have replacement hardware available on which your
system can be recreated and you must try out if it works
to recreate your system with your recovery medium on your
Be prepared that your system recovery fails to recreate
your system. When it fails to recreate your system
it is usually a dead end. Be prepared for a manual
recreation from scratch. Always have all information
available that you need to recreate your particular
system manually. Manually recreate your system on your
replacement hardware as an exercise.
For more information see