Thanks for your reply and the recommendation, dragonmouth. I knew a few of these links already but not all of them. I certainly will search for ‘101 Linux Hacks´. Sounds like many tips in one place.
Stay safe, Hans :)

Looks like it is time to re-install. Obviously some module or other is borked.

“I like this idea. What would you put in /data vs /home?” /DATA partition usually contains Documents, Videos, Pictures/Images, Music folders. IOW, any files that you create. It could contain your Downloads.

For a more in-depth discussion, do a search on “Separate home partition” and “Separate data partition”. The articles found will tell you why you should/should not set up separate partitions. Exactly how to set up these partitions in Windows and in Linux. What files to put in these partitions. While you’re at it, check out articles on the pros and cons of setting up various other Linux partitions (/tmp, /var, /opt, /usr).

There are quite a few Linux hacks books out there. Many of them are free to download. Check out sites such as DistroWatch, ItsFoss, FossLinux, HowToGeek, MakeUseOf, Make TechEasier, and others. Over the years I have built up a library of links to Linux articles on those sites. AND don’t forget TecMint. Go through their archive of articles. I’m sure you will find many that will give you what you are looking for.

One book I can think of is “101 Linux Hacks”. Also, do an Internet search on “Linux hacks” and similar terms.

I like this idea. What would you put in /data vs /home?