The where, whereis and whatis commands summarize commands, show where executables are, and point to relevant man pages.

If you ever had to change or manage a user password on Linux, I've got two essential commands you need to know - and how to use them.

Linux/BSD command line wizardry: Learn to think in sed, awk, and grep "Do people really write these long, convoluted commands?" In a word: yes.

Jack Wallen demonstrates how to install software from the command line on Ubuntu, AlmaLinux, Arch Linux, and openSUSE.