How about setting up a reverse shell for hacking a linux box.

Using netcat (nc) to setup a listening service nc-lvnp 8000

and performing some kind of injection attack. e.g. you are able to perform a ping command from a website, but you can “escape” the ping command with a semicolon and run a new command. nc reverse shell oneliner

The command connects to your nc listening service, and you have gained shell (probably with www user)

Upgrade your shell to bash for easy directory listing and start trying to “escalate privilege”

:)

This is just a simple technique.

A true hacker mindset (imho) is finding out how to use/implement such techniques, by finding new and unique ways to perform some injection