Hands-on

Practice terminal

A shell you can actually type into. It runs the commands from the Linux course against a simulated filesystem — so you can try things, break things, and see real-shaped output. Nothing here touches a real machine; experiment freely.

you@sandbox

Practice shell — nothing here is real. Type 'help' to begin.

Command input, prompt you@sandbox:~$

Start with help. Then try ls, cd projects, cat notes.txt, grep TODO notes.txt, and redirection: echo "a new line" >> notes.txt. Use the up arrow to recall a previous command.

There is a small network here too. nmap intranet.test to see what is open, dig intranet.test +short for its address, nc gateway.test 22 to read a banner, and curl -i http://intranet.test/admin to see a response nobody wanted you to have. It is a simulation: nothing here reaches anything real, and the names are under .test, which can never resolve on the internet.