Advanced things for the command line.
Some notes on the bash shell that I used when I was teaching a course on Linux.
Can't remember what a command does, or even what a command's name really is?
Add aliases for common commands or strings of commands.
A few short pieces on finding things on your computer.
Use the history command to find out what you already did on the command line - and then rerun it.
One simple command converts man pages to text.