You can see it againUnder pressure people bring back shapes and positions long after the wording has gone.
Picture superiority · Shepard 1967, Standing 1973
COMPTIACompTIA Linux+
CompTIA Linux+ certification validates your ability to manage, secure, automate, and troubleshoot Linux systems in cloud and hybrid environments. It is ideal for Linux systems administrators, systems engineers, and network engineers. Earning this certification demonstrates your capability to support and protect critical Linux platforms.
Exam formatMultiple-choice and performance-based
Duration90 minutes
DeliveryPearson VUE
Passing score720
Free questions710
Content last reviewed 1 October 2023 · Up to date
The certification
What XK0-006 proves, and what it asks of you
What this certification covers, who it is written for, and what the exam itself looks like on the day.
5domains
29objectives
225concepts
US $399exam fee
What it is
What this certification is
What it validates, who it is written for, and the experience it assumes.
About this certification
The CompTIA Linux+ certification validates your skills in managing, securing, automating, and troubleshooting Linux systems in both cloud and hybrid environments. It is designed for professionals who need to demonstrate their ability to support and protect critical Linux platforms that businesses rely on.
This certification provides hands-on experience with automation, orchestration, security, and containers, preparing you for roles such as Linux systems administrator, systems engineer, and network engineer. It emphasizes practical skills over theoretical knowledge, ensuring you are ready for real-world challenges.
Who it’s for
This certification is intended for Linux systems administrators, systems engineers, and network engineers who are responsible for managing and securing Linux systems in cloud and hybrid environments. It is suitable for professionals who want to validate their skills in supporting and protecting critical Linux platforms. Candidates should be comfortable with automation, orchestration, security, and container technologies, and have a strong understanding of Linux system management and troubleshooting.
Recommended experience
12 months of hands-on experience with Linux servers; CompTIA A+, Network+, or Server+, or comparable knowledge is recommended. Experience with Linux server management; Familiarity with automation and orchestration tools; Understanding of security practices and container technologies
The syllabus
What you’ll learn
Every domain and objective CompTIA measures, with the weight they carry on the exam.
The official CompTIA exam outline · checked 1 October 2023 · See the source
System Management
- Linux basics
- Device management
- Storage management
- Network configuration
- Shell operations
- Backups and restores
- Virtualization
Services and User Management
- Files & directories
- Account management
- Process control
- Software management
- Systems management
- Containers
Security
- Auth & accounting
- Firewalls
- OS hardening
- Account security
- Cryptography
- Compliance
Automation, Orchestration, and Scripting
- Automation
- Shell scripting
- Python basics
- Version control
- AI best practices
Troubleshooting
- System monitoring
- Hardware/storage
- Networking
- Security
- Performance
On the day
The exam itself
Everything CompTIA publishes about sitting it, and nothing we inferred.
Prerequisites
No mandatory prerequisites — this certification has no required predecessor exam or credential.
Exam codeXK0-006
CertificationCompTIA Linux+
Exam formatMultiple-choice and performance-based
Duration90 minutes
QuestionsMaximum of 90 questions
Passing score720
DeliveryPearson VUE
LanguagesEnglish
PricingUS $399
After you pass
Where this credential goes next
The path CompTIA lays out, how the credential is kept, and where to book.
Step-by-step path to CompTIA Linux+
Credential earnedCompTIA Linux+ Certification Renewal and maintenance
The CompTIA Linux+ certification is valid for three years. Renew before it expires by completing CEUs or retaking exams. Stay current with the latest technologies and maintain your certification.
Learn more about renewal requirements Lifecycle status
This certification is currently active and available. CompTIA maintains this certification to validate current skills and industry relevance.
Exam status: ActiveMaintained by CompTIA
Exam registration
Register for the exam through Pearson VUE, CompTIA’s authorized testing partner.
Schedule your examVisit the official CompTIA certification page for exam policies and requirements.
View the official pageYour coach
And when you are serious, your coach Pip takes over
Your coach in the app reads what you have answered with the book closed and tells you one thing to do tonight. It will not count an answer you gave with the page open, and it will tell you when you are not ready.
See how the coach worksBefore you book
Questions people ask
Is there a hands-on component in the CompTIA Linux+ exam?
Yes. The exam includes performance-based questions that require hands-on tasks.
What job roles does the CompTIA Linux+ certification map to?
It aligns with roles such as Linux systems administrator, systems engineer, and network engineer.
If I fail the CompTIA Linux+ exam, when can I retake it?
You must wait 24 hours after a first failed attempt, and 14 days before each subsequent attempt.
Can I recertify by passing a different CompTIA exam?
Yes. Earning a higher-level CompTIA certification can renew this credential.
Information freshness · Content last reviewed on 2023-10-01 Up to date
Practice free questions 710 questions, free, no account needed.
The curriculum
The whole exam, mapped and written
Every domain, every objective, and every concept CompTIA measures — each one written out.
5domains
29objectives
225concepts
156free pages
The domains, and what sits inside them
Every objective below is a page you can open and practise now, without an account.
The official CompTIA exam outline · checked 1 October 2023 · See the source
1System Management191 questions
Linux basics10 concepts · 8 pagesOpen →Device management7 concepts · 6 pagesOpen →Storage management12 concepts · 7 pagesOpen →Network configuration7 concepts · 6 pagesOpen →Shell operations8 concepts · 3 pagesOpen →Backups and restores8 concepts · 6 pagesOpen →Virtualization10 concepts · 6 pagesOpen →
2Services and User Management155 questions
3Security133 questions
4Automation, Orchestration, and Scripting109 questions
Not a table of contents
Every line on this map already opens
In front of every objective the practice pages are already there, free and without an account. This is one objective, opened.
Linux basics8 pagesOpen →
Free in front of it
38 questions on this objective, five to a page. Every range above is a real page, open now, with no account.
Reading the map is not the same as knowing the ground
The curriculum tells you what is on the exam. Proving you know it is a different job — and it is the one the closed-book run does.
Free questions
710 questions. No account, no card.
The whole bank is open. 5 questions to a page, every answer explained, and a discussion thread on each one.
710questions
156pages
29objectives
Freealways
Browse by domain
Every objective, and every page range, is a link — so you can pick up exactly where you left off.
1System Management191 questions
2Services and User Management155 questions
3Security133 questions
4Automation, Orchestration, and Scripting109 questions
5Troubleshooting122 questions
What a practice page gives you
1Five to a page
Short enough to finish, long enough to matter.
2Every answer explained
Not only which one is right — why the others are wrong.
3A discussion on each
Ask, answer, and vote. Every question has its own thread.
A question, and the idea behind it
Every question comes from a concept
These are not trivia. Each one is written against a concept in the book, so when you get one wrong there is somewhere to go and find out why.
The visual book
See it once. Carry it into the exam.
The pages shown here come from our AI-900 book — an example of how each concept is written in plain language and, where the idea needs one, drawn as a full page you can take in at a glance.
225concepts
710free questions
Why a picture, and not another paragraph
Three reasons, and each one is a real finding rather than a slogan.
You can see it againThe whole idea at onceWhere it starts, what happens in the middle, what comes out, and the mistake to avoid.
Multimedia principle · MayerThe look-alikes sit togetherThe pairs the exam tests are drawn side by side, so the difference is seen, not told.
Dual coding · PaivioWhat one page is made of
You are never asked to read a poster here — only to see how one is built. After that, every other page is legible at a glance.
1A numbered strip on top
The idea as a sequence, followed with a finger before a word is read.
2Panels for the parts
What it is, how the machine learns it, when it is the right tool.
3The trap, framed
The distinction the exam tests, given its own box instead of buried in prose.
4One line at the bottom
The sentence to carry into the exam room.
Open book, on purpose
Answer it with the picture beside you
This is the part that teaches. The illustration and the written explanation stay where they are while you work, so a scenario stops being a memory test and becomes something you can simply look at.
It teaches · it does not count
A smartphone uses AI to unlock when the owner looks at the camera. Which AI capability is being used?
AImage classification
BFacial recognition
COptical character recognition
DObject detection
Look at the five steps. Detect finds a face, align straightens it, encode turns it into numbers, search compares it with a stored face, and decide answers one question: is this the same person? Classification would only say “a face”. Detection would only draw a box. Neither decides whose.
Then the page shuts, and it starts counting
The same questions come back with the book closed — that run is the one that counts. After it, your coach picks one thing for tonight, sized to the time you have, and brings pages back before you lose them.
Testing effect · Roediger & Karpicke 2006 · spacing effect · Cepeda et al. 2006
Official resources
Straight from CompTIA
Where the exam is defined, scheduled and scored.
1official link
225concepts mapped
The source
CompTIA’s own pages
We link to them rather than repeat them, so nothing here goes stale behind them.
Checked against the source
Every objective on the official CompTIA outline already has questions here
We build from the official skills outline, not from a summary of it — 29 objectives, 225 concepts written under them, and free questions against every one. When CompTIA changes the outline, this page changes with it.
29objectives on the outline→225concepts written→710free questions
An official page tells you what will be asked. It cannot tell you what you will get right.
That is the only question worth answering the night before, and no link answers it. You answer it by taking the questions with the book closed, and seeing what comes back.