That’s actually how I learned. My first book was ‘UNIX in a Nutshell’ and I read it cover to cover even though it was a desktop reference guide. I lived in that book for years. The more I get into writing the badges for what I’m now calling the Linux Beginner Boost, the more I find myself listing out individual commands. When I start to fret about how many there are, I remembered my start with my first book, so I’m all good.