I have been using Linux on and off my entire life. Sadly that does not mean I have become an expert. I mostly figured out how to run the programs I needed and asked for help when I failed.
I want to know how everything works and why, I want to fix problems when they come around and know Linux (and yes I mean the systems built on the linux kernel lol) like the back of my hand.
I was going to take courses at the Linux Academy but thought I’d ask here for ideas and suggestions. What are other courses, sites, books, etc that I should do to actually become an expert in everything linux?