Some shortcuts that I learned while working with Linux. Most of these are very basic, so if you have even moderate experience working with the Linux shell, you probably won’t find anything new here.

Commands

sudo !!

Run last command with sudo privileges

Separators

1. ; - Separator. Run first command and then second command.
2. && - Logical and. Run second command only if first command exits successfully.
3. || - Logical or. Run second command only if first command fails.

Create multiple folders

mkdir -p folder/{dir1, dir2}/{dira, dirb, dirc}/{1..100}

See directory size

du -sh dirname

Monitor system

1. See free memory - free with -m or -g flags
2. Process viewer - htop

Keyboard shortcuts