CTF / practice and transfer
Learn Linux through a browser-based CTF.
Start in a terminal with no setup. Build command-line fluency through open, structured scenarios, then carry those habits into live targets that do not know what you are expecting.
One learning loop
Practice a skill. Transfer it. Keep going.
CTF at CLI-Games is not one difficulty ladder or one kind of player. Open the map where you are, use the support that helps, and close the context when you are ready to work independently.
Practice
CTF Training
Start with command-line fundamentals and follow an open skill map into reconnaissance, scripting, exploitation, forensics, and analysis. Guidance is available when a technique is new; every available scenario remains open.
Explore the training game →Transfer
The Range
Take the habits into rotating live challenges on isolated Linux infrastructure. Investigate an unfamiliar target, recover objectives, and see what survives contact with a real system.
Enter the live challenge →Understand
The CTF Manual
Learn what capture the flag is, why the terminal matters, and how Linux fluency carries into security work before you start hunting flags.
Read the CTF guide →New to the terminal? Start with the foundation route. Already comfortable in Linux? Choose a harder scenario, roam the map, or enter The Range and see what you actually remember.
Why the terminal
The useful layer sits beneath the interface.
The goal is not to memorize commands for their own sake. It is to know how to inspect a system, follow evidence, test an assumption, and keep moving when the abstraction stops helping.
Start with one command. Let the system get interesting.
The first challenge is free, immediate, and playable in your browser. No VM, VPN, or prior CTF experience required.