If you want to make backup copies and restore a server based on GNU / Linux, then you have a large number of tools available at your fingertips. Many of them are great, free and open source, as well as capable of automating work a lot and making life easier for the system administrator. One of those tools is ReaR (Relax-and-Recovery). It is nothing new, but I think it is worth knowing, just as I have shown many other interesting apps that are not talked about so much in other media ...
The Backups they are a common activity in any system, much more in servers that handle quite relevant information. And even if you have disk redundancy, in many cases you need these types of apps that can help you in this task. With ReaR you can use a very useful ad-hoc tool to be calm when it comes to making backup copies and system recovery.
ReaR is a systems administration tool open source to copy and restore files when disasters strike, both from servers and home PCs. ISO images of the boot of a GNU / Linux system or server can be created in a simple and safe way, in addition to restoring them when the problem arises.
With ReaR you can create a boot image with the latest status of your server or home computer, with a multitude of options for the administrator that also give flexibility when selecting files for backup.
Su usage is quite simple with its text-based interface, and its installation can also be done easily from source code or the repos of your distro if it is available (especially for RPM-based).