Confidence comes
from doing.

Understand. Practise. Verify.

Reading a command is a start. Recalling it without the answer and applying it to a changing system are different skills. Terminal Drill connects short drills with spaced review and practical tasks, keeping guided participation distinct from independent evidence.

A companion, with clear limits.

The app runs teaching simulations, not a full Linux operating system. Each lab declares the commands and state it represents. Real-machine guides bridge the gap to a disposable Linux practice environment. Practical content is labelled as awaiting independent technical review.

Room for a little play.

Classic keeps the familiar, focused experience. Optional Adventure mode adds missions, achievements and a growing profile. Both share your learning history. XP recognises participation; it does not certify competence or predict an exam result.

A straightforward promise.

Learning content works offline. Progress stays on your device unless you choose to export it. There are no accounts, app analytics or advertising SDKs. The existing one-time Full Access purchase includes every track and future content updates.

The free library stays free.

This website includes a separate 36-lesson Linux course, command reference, recall exercises and practice guides. They remain open to everyone. The expanded app curriculum is described on the RHCSA page.

Made by an independent developer.

Terminal Drill is developed by Richard Ziolkowski. It is not affiliated with or endorsed by Red Hat. Red Hat, RHEL and RHCSA are trademarks of Red Hat, Inc.

Version 5.3 is being finalised for release. Read what is changing, or get in touch.