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CompTIA Linux+ flashcards

3 decks · 213 cards · built into Willys · free samples below

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Written against: Current Linux+ exam objectives (topics common to XK0-005 and its successor). Updated 2026-10-10.

What's in it

Every deck follows the course outline, with tags you can study or suspend topic by topic. Open a deck to study its free sample right here.

Learn · 2 decks · 153 cards

Concepts, mechanisms and the questions a course or exam asks about them.

System Management and Scripting Day-to-day Linux administration for Linux+: the filesystem hierarchy, boot and systemd, packages, partitions, LVM and fstab, users, groups and special permission bits, processes, signals and timers, network commands, Bash scripting, Git, containers and infrastructure as code. 10 free · 76 cards in the app Security and Troubleshooting Hardening and fixing Linux for Linux+: SSH keys and sshd settings, sudoers and PAM, SELinux (and AppArmor, no longer in XK0-006), firewalld, ufw and nftables, file integrity and auditd, the journal and /var/log, and diagnosing storage, CPU, memory, network and boot faults with the right commands. 10 free · 77 cards in the app

Practice · 1 deck · 60 questions

Multiple-choice practice questions, one best answer each, with the reasoning.

Practice Questions Multiple-choice practice questions, one best answer each, on systemd, packages, LVM, users and permissions, SSH, sudo, SELinux, firewalls, scripting, containers and troubleshooting. 6 free · 60 questions in the app

Study guide

Topics covered

The decks follow the order of the course outline. Numbers are cards per topic.

  • System Management 56
    • Filesystem Hierarchy 6
    • Boot and systemd 11
    • Package Management 8
    • Storage and LVM 11
    • Processes and Scheduling 12
    • Networking Tools 8
  • Security 80
    • Users and Groups 8
    • Permissions 12
    • SSH and Remote Access 14
    • sudo and PAM 13
    • SELinux and AppArmor 14
    • Firewalls 10
    • Integrity and Auditing 9
  • Scripting Containers and Automation 31
    • Bash Scripting 13
    • Git 5
    • Containers 8
    • Infrastructure as Code 5
  • Troubleshooting 46
    • Logs 8
    • Storage 10
    • CPU and Memory 9
    • Networking 10
    • Boot and Services 9

A study plan

  • 8 new cards a day covers everything in a month, leaving the last weeks for review.
  • 5 new cards a day covers everything in two months, leaving the last weeks for review.

Willys schedules reviews for you (FSRS spaced repetition), so the daily number above is only for new cards; reviews of what you have learned come back on their own. Study a topic's cards right after you meet it in class, suspend topics you have not reached yet, and use the app's quiz mode in the final two weeks.

How to get these decks

  1. Install Willys on your iPhone, iPad or Mac — App Store. 14-day free trial, then $14.99 a year.
  2. In Willys, tap Exam Library at the top of your Decks (or Browse Exam Library… under the + button), find the exam on its shelf or by search, tick it and tap Add.
  3. Study. The exam comes in as its own collapsible folder, every card scheduled by FSRS spaced repetition. Nothing you already have is changed.

Every deck is built into Willys

All 3 CompTIA Linux+ decks (213 cards), with FSRS spaced repetition, quizzes and mock tests, on iPhone, iPad and Mac. 14-day free trial, then $14.99 a year.

Get the app

In Willys, tap Exam Library at the top of your Decks (or Browse Exam Library… under the + button), find the exam on its shelf or by search, tick it and tap Add.

About these cards

Review status: Second-reader reviewed, with corrections applied.

Checked against:

  • CompTIA Linux+ exam objectives — topic outline only; no text copied. Tags follow the four XK0-005 domains; as of October 2026 the current exam is XK0-006 (launched 2025-07-15), and XK0-005 retired on 2026-01-13.

These are independent study notes written for Willys. They are not official exam material, may contain mistakes, and are no substitute for your course, your teacher or the exam owner's own publications. Found an error? Tell us — corrections ship as a new version of the deck.

CompTIA® and Linux+® are registered trademarks of CompTIA, Inc. Linux® is the registered trademark of Linus Torvalds. This product is not affiliated with or endorsed by CompTIA.

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