Anecdote this jogged from my memory: my first Unix experience was NetBSD on a SEGA Dreamcast game console, of all things. This must have been some time in 2000 or 2001, but I remember sitting there trying every possible command I could think of trying to find one that did anything at all so i could keep going and learn more. The DOS commands I knew obviously didn’t do anything. Neither did anything like ‘help’ or ‘?’. After five minutes or so of trying commands off the top of my head I tried ‘exit’, and that was the end of my Unix experience until I mail ordered a Mandrake Linux CD-ROM set in 2002 :)