The problem I had when I wanted to read a somewhat in-depth tutorial on Linux / the Linux terminal (one or both), is that the tutorial said that it assumed that you were a sysadmin. What? I couldn't just be a regular user who has none of the experience and few of the needs of a sysadmin? No wonder Linux has a reputation for being needlessly impenetrable.

(I don't recall the exact tutorial or if it is representable of such tutorials in general.)