Locked In: Prep for Linux+

XK0-005 Legacy Study Library

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

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 DISCLAIMER This is independent historical reference material.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.

Ratings & Reviews

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• Reframed XK0-005 throughout the app as a retired legacy reference and added clear guidance that current candidates should use XK0-006 materials. • Clarified timed practice and PBQ-style activities as independent knowledge review, not official exam content or a certification-readiness predictor. • Improved purchase, restore, and entitlement-state handling. • Improved progress persistence, study planning, and flashcard review behavior. • Corrected content and fixed reliability issues across core study screens.

Version 2.0

The developer, OMAR DANIEL GRAZIANO, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

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    Information

    Seller
    • OMAR DANIEL GRAZIANO
    Size
    • 4.4 MB
    Category
    • Education
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    Languages
    • English
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    • © 2026 Omar Graziano
  • Developer Website
  • Privacy Policy

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