I have never read a book about improving my terminal knowledge. I have a few tricks I have picked up over time (probably through posts like this!), but never do

I have never read a book about improving my terminal knowledge. I have a few tricks I have picked up over time (probably through posts like this!), but never done holistic research on the subject. Therefore, despite having used the terminal for decades, I likely have a similarly long list of basic terminal knowledge gaps. I do not know what I do not know.