You could definitely mix and match different commands in this mini-CTF tutorial, to give it a bit more flavour. Maybe consider a war-game style game, where each

You could definitely mix and match different commands in this mini-CTF tutorial, to give it a bit more flavour. Maybe consider a war-game style game, where each level needs to be completed to get the password for the next one (or, similar online puzzle series where each puzzle's solution links to the next one, etc.). Such highly-linear puzzles have proven (for me at least) to be great learning tools simply because users are forced to focus on one learning objective at a time. Maybe a kind of "digital archaeology" story, in which you have to coax data off of an old server in various ways and analyze old git repos? Does sound kind of fun...