FirstThings1

Absolutely essential: learn these first:

cd ls cp rm mv cat less

Help on stuff:

man

Making better use of the terminal:

tmux

Editors I use daily:

vi vim nvim

Scripting stuff:

python (for when bash gets awkward)

Text manipulation (inside pipelines -- learn about |)

cut sed awk

Clipboard access:

in X11: xsel
in Wayland: wlcopy/wlpaste

I have two custom commands pp (for paste) and pc (for copy) which on Windows/cygwin Windows/wsl Linux/x11 Linux/wayland Macos, run the appropriate copy/paste command, and given files as arguments, copy from/paste to those files. The beauty of scripts and functions.

Then in bash learn functions:

hello() { echo "Hello World"; }

functions let you write your own shorthands, which makes you more efficient.

Then for and if:

for s in *.txt; do
  echo "$s is a text file"
done

if [ -e "mrflibble" ]; then echo "mrflibble exists"; fi

or

[ -e "mrflibble" ] && echo "mrflibble exists"

the -e mrflibble evaluates whether or not mrflibble exists. See man test or more.