I have very little experience with linux, so maybe this is a dumb question :)
I run Ubuntu 24.04 on a machine, and I had an old HDD in a usb-case which I mounted using fstab. Worked fine, but I decided it wasn’t appropriate for my purpose and removed it (physically and from fstab).
But it still shows up in the file manager? What am I missing?
Sure, I mean I am used to reading (and writing) manuals and documentation, so I usually go that route first when I know where to look. And your answer was helpful. Anyway, what are some authoritative ressources I should consult concerning these fundamental concepts?
Start with the man pages. Running the command man followed by a space and then followed by the command you’re using will almost always give you a man page of the basics of how that command works. The fstab has its own man page too. An internet search “man fstab” or whatever command you’re interested in should also net many mirrors of the those man pages as well.