- pwd, cd, ls, mkdir, rm, touch
- file permissions
- find
- pipes, redirection
- echo, cat, more, less, head, tail
- [e|f][z]grep, sed, awk
- sort, uniq
- quoting
- variables and substitution
- running commands in scripts
- script arguments
- looping
- functions
- curl
- wget
- jq
- Bonus: tmux
- insert and normal mode
- movement (jkl; b, w, ^, $, Ctrl-B, Ctrl-F)
- searching (/, ?, n, p, *), replacement
- i, a, d, c
- yanking and pasting
- saving, quitting