Commands on the Command Line?

Question

Command line

What are some cool commands on the command line?
And here's another question.
How to write scripts through the Command Line? (Example: Hello World, or creating folders.)

Answer 1

> What are some cool commands on the command line?
man man
> inscription Hello World

#!/usr/bin/env bash
echo "Hello world"

> create folders

#!/usr/bin/env bash
mkdir /tmp/somedir

If under niks - then save it to a file, say chmod +x on it, run it.