Bash & terminal shortcuts.
Edit the command line at speed — move and delete by word, search history, and control commands. Works in bash & zsh.
Your shell already has superpowers
Most people retype or arrow through long commands one character at a time, not realising the shell has rich line-editing built in. The two to learn first are Ctrl + A and Ctrl + E, which jump to the start and end of the line — far faster than holding the arrow keys. Add Alt + B and Alt + F to hop whole words, and you can reach any part of a command instantly.
History is the real time-saver
The single most useful shortcut here is Ctrl + R: start typing any part of a command you ran before and the shell finds it, so you almost never need to retype long commands. Press Ctrl + R again to step further back. Combined with Ctrl + W (delete the word behind the cursor) and Ctrl + U (clear the line), you can recall a past command and tweak it in a couple of keystrokes. These readline keys work identically in bash and zsh, so the habits carry across machines. Pair them with the Linux commands and the tmux cheatsheet for a complete terminal toolkit.