bvdlingen Did you have a look at Déjà Dup Backup Tool?
I did. And Duplicity. And some others. I don't remember what problems I had with what applications, but I couldn't use any of the ones I tried. The "problems" were such as failure to work with my NAS, which is the destination for backups.
Yesterday I searched "Backup" in the Software Center, came across restic, and gave that a try. Running it from a CLI without arguments lists all the commands and options, and I found it trivial to create and initialize a remote repository on my NAS. I then had no problem backing up my home folder.
Unless I find any problems with it, I'm pretty sure I'll adopt it for backups of my hardware installations. VMs, of course, are easily backed up by making VirtualBox snapshots on the host machine.