Post-installation advice - system backup with Rescuezilla

As a newish Zorin escapee from Windows, I thought other new users might benefit from my recent experience.
After a few minor niggles with my Zorin 18 Core, including occasional random crashes, yesterday I reinstalled Zorin from scratch. As part of that I appear to have set something I shouldn't - maybe secure boot, I'm not sure.
After several hours of reinstalling apps and passwords, I went one step too far in entering a Terminal command to try to enable fingerprints, which were refusing to register. Next time I rebooted, the login password had underneath the message: "Sorry, password authentication is not available". Oh dear... I spent the rest of the evening trying to work out how to fix this. I felt that I had just created a paperweight. A re-install of Zorin wouldn't work, I guess because of secure boot.
This morning I remembered that I had taken some Rescuezilla images, which were still on a USB drive. I booted Rescuezilla, chose the most recent image from December, and started the restore, without much hope. But it worked. It didn't restore my logical data volume, but I had backed up the data anyway, so that was fine.
So my message to new users is: install Zorin, spend a couple of hours installing apps and general setup, then take a Rescuezilla image at a point where you're pretty happy with progress. You'll thank yourself for it one day. I did.

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