Mastodawn

My daughter was advised/encouraged by their teacher to take a Linux (sic) command line course.

She was enjoying it until she unexpectedly hit a paywall at chapter 4 (of 6).

Can you recommend a free as in freedom GNU/Linux command-line course or tutorial?

@janneke
One of us! One of us! One of us!

I don't have a tried course, still I could try to throw an exercise or two from my experience, depending on the last/next lessons.