I highly recommend O’Reilly’s Learning the Bash Shell in paperback form: www.oreilly.com/library/view/…/0596009658/.
The other responses you’ve received so far don’t offer much insight into the historical background and underlying mechanics of the shell, which are crucial to understanding the "Why?"s of command-line quirkiness.
Nasan@sopuli.xyz 10 months ago
This is a fun game approach to learning some bash basics.