Back-ups in Linux

I've been using computers since the time when you powered up and it just ran. The OS(Operating System) was baked into the hardware, so you didn't have to worry about making back-ups. When I got my Amiga I made a copy of my workbench disks and kept the original in the top draw of my desk. I didn't need any other back-ups. Then there was the PC era, and I messed up my DOS/Windoze installs so regularly that I just got good at reinstalling the OS. So much so that I got my Windoze 95 install time down to 15 minutes with a 3.5" boot-disk and a copy of the ISO on a ZIP disk and that included installing all the drivers. And the expectation of catastrophic OS disaster has followed me, something goes wrong with the OS for whatever reason, just "Nuke and Pave". This means that I have always tested my recovery solutions as I've gone along. A few time I've lost stuff, but for the most part, I've been ok. Shortly after I started using Linux as my full time/only OS. I found a good set-up was to have…