Linux+ Practice Test
Updated October 2026Facts verified Oct 21, 2026 against CompTIA
Getting the CompTIA Linux+ certification is a big step for IT pros. It shows they know how to manage and run open source operating systems. This guide offers key tips and strategies to pass the CompTIA Linux+ exam. It covers important exam goals, how to prepare, and the technical skills needed for Linux system administration. Practice with the free Linux+ practice test on PracticeTestGeeks (7 questions with answer explanations).
Linux+: upcoming dates and official changes
- Updated Oct 21, 2026: Retake fee is now Full exam price each attempt; no free or discounted retakes (previously Full exam price each attempt; no free or discounted retakes).
- Updated Oct 21, 2026: Retake policy is now No wait before 2nd attempt; 14 calendar days before 3rd and later attempts (previously No wait before 2nd attempt; 14 calendar days before 3rd and later attempts).
- Updated Oct 21, 2026: Number of questions (XK0-006 (V8)) is now Maximum of 90 questions (multiple-choice and performance-based) (previously Maximum of 90 questions (multiple-choice and performance-based)).
Facts verified Oct 21, 2026 against CompTIA. Dates that have passed are removed automatically.
- The CompTIA Linux+ V8 exam (XK0-006) has a maximum of 90 multiple-choice and performance-based questions. (CompTIA)
- Candidates get 90 minutes to complete the CompTIA Linux+ V8 exam (XK0-006). (CompTIA)
- The passing score for the CompTIA Linux+ V8 exam (XK0-006) is 720 on a scale of 100 to 900. (CompTIA)
- CompTIA Linux+ candidates must pay the full exam price for every attempt, because CompTIA offers no free or discounted retakes. (CompTIA)
- CompTIA Linux+ candidates can retake the exam right away after a first failed attempt, but must wait at least 14 calendar days before a third or any later attempt. (CompTIA)
- A CompTIA Linux+ certification is valid for three years from the date it is earned, and renewing it through Continuing Education extends it for another three years. (CompTIA)
- Candidates schedule the CompTIA Linux+ exam through CompTIA Central and take it either at a Pearson VUE test center or online through Pearson OnVUE. (CompTIA)
- CompTIA recommends 12 months of hands-on Linux server experience, plus CompTIA A+, Network+ or Server+ or comparable knowledge, before taking the Linux+ V8 exam. (CompTIA)
Facts verified Oct 21, 2026 against CompTIA. Dates that have passed are removed automatically.
Linux+ Exam at a Glance
| Item | Detail | Official source |
|---|---|---|
| Number of questions (XK0-006 (V8)) | Maximum of 90 questions (multiple-choice and performance-based) | CompTIA |
| Time limit (XK0-006 (V8)) | 90 minutes | CompTIA |
| Passing score (XK0-006 (V8)) | 720 on a 100–900 scale | CompTIA |
| Retake fee | Full exam price each attempt; no free or discounted retakes | CompTIA |
| Retake policy | No wait before 2nd attempt; 14 calendar days before 3rd and later attempts | CompTIA |
| Validity | 3 years from the date of certification | CompTIA |
| Delivery | Pearson VUE test center or online via OnVUE | CompTIA |
| Eligibility (XK0-006 (V8)) | Recommended: 12 months of hands-on Linux server experience; A+, Network+ or Server+ (or comparable knowledge) | CompTIA |
Facts verified Oct 21, 2026 against CompTIA. Dates that have passed are removed automatically.
Free Linux+ Study Tools
Interactive Linux+ resources on PracticeTestGeeks, free to start:
- Linux Firewall and Network Security — 36 questions with answer explanations
- Linux+ flashcards — review key terms and concepts card by card
- Linux+ study guide — topic-by-topic overview of what the exam covers
- Linux+ cheat sheet — one-page printable summary for last-minute review
Linux+ Practice Test Questions
Prepare for the Linux+ exam with our free practice test modules. Each quiz covers key topics to help you pass on your first try.
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Key Takeaways
Free CompTIA Linux+ Practice Test Online
- Understand the fundamental concepts and objectives of the CompTIA Linux+ certification
- Familiarize yourself with the exam format, including the test structure and scoring system
- Develop proficiency in essential Linux skills, such as command line interface, system administration, and network configuration
- Implement effective study strategies and practice tests to enhance your preparedness
- Use online resources, study guides, and expert insights to optimize your exam preparation
Understanding the CompTIA Linux+ Certification Fundamentals
The CompTIA Linux+ certification is a top choice in the IT world. It shows you know your stuff about the Linux operating system. It’s packed with key skills and knowledge, making it great for your career.
- ✓Confirm your exam appointment and location
- ✓Bring required identification documents
- ✓Arrive 30 minutes early to check in
- ✓Read each question carefully before answering
- ✓Flag difficult questions and return to them later
- ✓Manage your time — don't spend too long on one question
- ✓Review flagged questions before submitting
Core Exam Objectives and Requirements
The Linux Professional Institute (LPI) runs the CompTIA Linux+ certification. It has two exams: LX0-104 and LX0-105. These tests check your skills in system architecture, installation, and more.
Test Format and Scoring System
Each exam lasts 90 minutes and has 60-90 questions. You need at least 675 out of 900 to pass. To get the Linux+ certification, you must score 500 out of 800.
Certification Benefits for IT Professionals
- Shows you’re good with Linux, a big deal in IT
- Boosts your job chances and pay as a Linux pro
- Is recognized worldwide, making you more attractive to employers
- Is a stepping stone to more advanced Linux certifications
Getting the CompTIA Linux+ certification can lead to many career paths. It’s a smart move for IT pros looking to grow.
Essential Linux+ Test Preparation Strategies
To pass the CompTIA Linux+ certification exam, you need a solid plan. This plan should cover the exam’s core topics and practical skills. Here, we’ll share key strategies to help you succeed in your Linux+ journey.
Start by learning the basics of the Linux+ certification. Knowing the exam’s layout, scoring, and main topics helps you focus your Linux training and Linux skills assessment.
Next, create a detailed study plan. Use a mix of CompTIA study guides, online tutorials, and open source software manuals. Practice with sample questions and full exams to track your progress and spot areas to improve.
- Get to know the exam’s goals and make a study plan.
- Use different study tools, like official guides, online resources, and practice tests.
- Make time for hands-on lab work to apply your Linux skills.
- Work on time management and test-taking strategies for the exam.
Hands-on experience is key for the Linux+ exam. Spend lots of time on lab exercises and real-world Linux use. Set up a Linux environment, whether virtual or dedicated, to try out commands and solve problems.
| Recommended Study Resources | Description |
|---|---|
| CompTIA Linux+ Certification Study Guide | Official exam prep guide from CompTIA |
| Linux Academy Online Courses | Video-based training for Linux+ exam |
| Linux Journal | Top publication for Linux pros |
| Linux + Hands-On Labs | Self-paced labs for skill building |
By using these Linux exam preparation tips, you’ll be ready to ace the Linux+ certification. You’ll show your skills in the open-source world.
Mastering Key Technical Components and Skills
To do well in the CompTIA Linux+ certification, you need to know the basics well. This part covers the main areas you must master. These include the command line, system management, security, networking, fixing problems, and making systems run better.
Command Line Interface Proficiency
Knowing the Linux command line is key for any Linux+ pro. You’ll show you can move around the file system, handle processes, manage users and groups, and use important Linux commands for different tasks.
System Administration and Security Concepts
Linux administration and security are big parts of the Linux+ exam. You’ll learn about managing users and groups, controlling access, setting up system services, and using Linux security to keep systems safe.
Network Configuration and Management
Being good at Linux networking is also important for the Linux+ certification. You’ll need to set up network interfaces, create firewalls, manage network services, and fix connection problems.
Troubleshooting and Performance Optimization
The exam will test your skills in fixing Linux problems and making systems run better. This means finding and fixing common issues, managing logs, and improving system Linux performance tuning.
| Technical Skill | Key Objectives |
|---|---|
| Command Line Interface |
|
| System Administration and Security |
|
| Network Configuration and Management |
|
| Troubleshooting and Performance Optimization |
|
Linux+: Pros and Cons
- +Linux+ exam preparation strengthens your knowledge across all domains
- +Passing the exam proves competency to employers and clients
- +Study materials and practice tests are widely available
- +Exam-based credentials are portable across states and employers
- +Clear exam objectives help focus your study plan effectively
- −Exam anxiety can affect performance — practice tests help reduce it
- −Registration fees are non-refundable if you miss your test date
- −Limited retake opportunities may apply with waiting periods
- −Exam content updates periodically — use current study materials
- −Testing center availability may require advance scheduling
Sample Linux+ Practice Questions
Try these questions from our free Linux+ practice tests. The correct answer and an explanation follow each question.
A Linux administrator needs to view which I/O ports are currently in use by the kernel. Which file provides this information?
- A. /proc/ioports
- B. /proc/devices
- C. /sys/bus/pci/devices
- D. /etc/ioports.conf
Answer: A. /proc/ioports
/proc/ioports lists the I/O port ranges currently allocated to kernel devices.
A Linux administrator is performing maintenance on a Docker host and needs to reclaim disk space. Which command should they use to remove all unused images, including tagged images that are not associated with any container?
- A. docker system prune
- B. docker image prune -a
- C. docker rmi $(docker images -q)
- D. docker image prune
Answer: B. docker image prune -a
The `docker image prune` command is used to remove unused images. By default, it only removes dangling images (those without a tag). The `-a` (or `--all`) flag extends this to remove all images that are not associated with at least one container, which is what the scenario requires.
A Linux system uses iptables. Which command saves the current rules so they persist after reboot on a Debian-based system?
- A. iptables --save
- B. iptables-save > /etc/iptables/rules.v4
- C. service iptables save
- D. systemctl save iptables
Answer: B. iptables-save > /etc/iptables/rules.v4
iptables-save redirects current rules to a file that iptables-persistent reads on boot for rule restoration.
Which file defines the default password aging policy for new user accounts on a Linux system?
- A. /etc/passwd
- B. /etc/shadow
- C. /etc/login.defs
- D. /etc/pam.d/common-password
Answer: C. /etc/login.defs
/etc/login.defs contains system-wide defaults for password aging, UID/GID ranges, and other account parameters.
Take the full Linux+ practice test
Linux+ Questions and Answers
How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy
Sources & references
Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy
- comptia.org — Score validity, retake fee, eligibility, exam format, time limit, test delivery · verified Oct 2026
- help.comptia.org — Renewal · verified Oct 2026