Linux

Move around directories and list files with pwd, ls, and cd.

Create, copy, move, and delete files and directories safely.

Read rwx permissions and change them with chmod and chown.

Inspect running processes and manage them with ps, top, and kill.

Search and transform text streams with the classic Unix trio.

Write reusable bash scripts with variables, conditionals, and loops.

Connect commands together and redirect input, output, and errors.

Bundle and compress files with tar and gzip.