I believe in good repetition. But what is good repetition? Nano on a dot file 5 times? For the command line it should involve commands that will save people time. Teach them: 1. how to use find and grep, and other commonly used commands. 2. introducing them to vi and explaining why people use it (instead of nano) 3. user configuration with a brief on the FS structure (what is in etc, usr, opt, etc...) 4. lastly, but most importantly, how powerful and dangerous the unix command line is. Why you should learn shell scripting. And getting started with shell scripting.

To me, that list would go from beginner to intermediate++