Say Hello to the Machine

This is a real Linux computer, and the black box in front of you — the terminal — is how you talk to it. You type a command, press Enter, the machine answers. That's the whole trick. Ask it three questions: who are you logged in as (whoami), where are you standing (pwd), and what's at the very top of the filesystem (ls /). Type each one, press Enter, and read what comes back. No traps, no wrong answers — this lab is just you and the machine, saying hello.