Locked In: Prep for Linux+

Explore the retired Linux+ XK0-005 blueprint as a historical study reference, with lessons, command review, practice, flashcards, and offline progress tracking.

Locked-In preserves the retired CompTIA Linux+ XK0-005 blueprint as an offline historical study library.

IMPORTANT

XK0-005 is retired. This app is not current Linux+ exam preparation and does not cover the current XK0-006 blueprint. Current candidates should use CompTIA's latest published objectives and current training materials.

WHAT'S INCLUDED

• Historical coverage of the four XK0-005 domains: System Management, Security, Scripting, Containers and Automation, and Troubleshooting • Short, command-focused lessons with visual explanations for the filesystem hierarchy, permissions, systemd, SSH, SELinux and AppArmor, firewalls, Bash, automation, containers, and more • Hundreds of original multiple-choice practice questions with explanations • Interactive scenario and PBQ-style activities for knowledge review; these are not official CompTIA questions or an exam simulation • A 60-question timed legacy knowledge-practice set with flagging and final review • Flashcards with spaced repetition and a searchable glossary of commands, paths, and concepts • Progress by domain, quiz history, bookmarks, personal notes, study streaks, and weak-spot review

FREE TO EXPLORE

A selection of lessons is available free so you can evaluate the library before purchasing. A single optional, one-time purchase unlocks the remaining lessons and study tools. There is no subscription.

PRIVATE BY DESIGN

No account is required. The app works offline and stores study progress on your device. It contains no third-party analytics, advertising, or tracking.

DISCLAIMER

This is independent historical reference material. It does not contain official exam questions and does not predict certification readiness. Not affiliated with, endorsed by, or sponsored by CompTIA. CompTIA and Linux+ are registered trademarks of CompTIA, Inc. Linux is a registered trademark of Linus Torvalds.