What is it?

What exactly is the CompTIA Linux+?

Prove you can actually run Linux — vendor-neutral, performance-based, and built for modern cloud and DevOps roles.

CompTIA Linux+ (exam XK0-006) is a vendor-neutral certification that validates real-world Linux system administration across on-premises and cloud server environments. It covers system management, security hardening, scripting, containerization, automation, and troubleshooting — the daily work of a Linux administrator rather than distribution-specific trivia. Because it is distribution-agnostic, the skills transfer across Ubuntu, Red Hat, Debian, SUSE, and the major clouds. It is frequently paired with CompTIA's A+, Network+, and Security+ or used as a stepping stone toward cloud, DevOps, and cybersecurity careers, and it is approved for DoD 8140 (formerly 8570) IAT Level II roles.

The path in brief

1. Confirm 12 months of hands-on Linux experience (or study to close the gap)
2. Buy the XK0-006 exam voucher from the CompTIA store
3. Build a free lab with VirtualBox/VMware or a cloud instance
4. Study the four weighted domains and practice PBQs daily
5. Schedule and pass the 90-minute Pearson VUE exam
6. Earn CEUs in CertCentral to keep the cert active for 3 years

Before you book

Who is eligible to sit the CompTIA Linux+?

Open to all candidates 18+ (minors may test with parental consent per Pearson VUE policy). No mandatory prerequisite certification is required to sit the exam.

Who it is for: Junior Linux administrators, cloud/DevOps support engineers, systems administrators, and IT/security pros adding Linux skills.

The test itself

What is the format of the CompTIA Linux+?

The CompTIA Linux+ is administered by Pearson VUE (test center or online OnVUE proctoring) and runs 90 minutes and requires 720 (on a scale of 100–900) — CompTIA publishes a numeric passing score for Linux+ to pass.

The fine print

What are the retake and renewal rules for the CompTIA Linux+?

Proctoring & delivery

Delivered by Pearson VUE with two options: an in-person proctored test center, or online proctoring via OnVUE with a live remote proctor (requires webcam, stable internet, and a private room).

Retake policy

If you do not pass, you may retake XK0-006 after a 14-day waiting period. Each attempt requires a new exam voucher; there is no limit on the number of retakes. CompTIA's standard candidate agreement governs retake rules.

Score reporting

A pass/fail result is shown on screen immediately after the exam. A detailed score report by domain is available in your Pearson VUE account and mirrored in your CompTIA CertCentral record.

Recertification

Linux+ is valid for 3 years from the certification date. Renew by earning 50 Continuing Education (CE) credits and paying the CE fee through CompTIA CertCentral, by earning a higher-level CompTIA certification, or by passing the current XK0-006 exam again.

Refunds & rescheduling

Exam vouchers are generally non-refundable but may be transferable or have a defined expiry; optional CertMaster training may be refundable within a limited window per CompTIA's terms. Review voucher terms at purchase.

What it pays

How much does this credential pay?

$96,800 median for network and computer systems administrators (BLS, May 2024)

There is no Bureau of Labor Statistics occupation called "Linux administrator", so any salary page that quotes one is quoting a job-board aggregate rather than government data. The closest official fit is Network and Computer Systems Administrators, and we have chosen it deliberately over the support-specialist categories used for entry-level credentials: Linux+ is not an entry certification. CompTIA positions it at roughly twelve months of hands-on Linux server experience, and the tasks on the blueprint — storage and filesystem management, systemd service administration, firewall configuration, container runtimes, shell and Python scripting — are administrator work, not help-desk work. That occupation had a May 2024 median of $96,800, with the lowest 10 percent under $60,320 and the highest 10 percent over $150,320. The distribution is worth reading carefully because Linux+ candidates tend to sit at both ends of it: someone adding Linux to a Windows-centric administration career is competing near the middle, while a Linux+ holder who converts the automation and container objectives into real platform-engineering work moves toward the top decile fairly quickly. The occupational headwind is real and should be stated plainly. BLS projects a 4 percent employment decline for network and computer systems administrators from 2024 to 2034, with about 14,300 openings a year arising entirely from replacement need. The infrastructure that is disappearing is manual, per-server administration — which is precisely why the automation, orchestration and scripting domain is the part of Linux+ worth over-investing in. The Linux Foundation's annual Open Source Jobs Report is the best-known named industry survey covering this workforce; we have not quoted a figure from it here because it does not isolate Linux+ holders specifically.

Job growth.-4% projected change 2024-34 (decline), with ~14,300 replacement openings a year; automation and cloud skills are what move you off the shrinking side of this occupation

Source: BLS Occupational Outlook Handbook — Network and Computer Systems Administrators

Your schedule

How long should I study for it?

100-130 hours of focused study

The first thing to establish is which exam you are actually studying for. XK0-006, the Linux+ V8 exam, launched on 15 July 2025 and XK0-005 was retired for English-language testing on 13 January 2026. XK0-006 is not a refresh — it restructured the blueprint from four domains into five, splitting Services and User Management out as its own area, and it modernised the automation content around containers, CI/CD, Python and Git. Material written for XK0-005 will leave you with real gaps. The current weightings are System Management 23 percent, Services and User Management 20 percent, Troubleshooting 22 percent, Security 18 percent, and Automation, Orchestration and Scripting 17 percent. Notice that System Management and Troubleshooting together are 45 percent of the paper, and that Troubleshooting is not a separate body of knowledge — it is the other four domains under pressure. The plan below runs ten weeks at roughly 10-12 hours a week and assumes you have a Linux VM you can destroy and rebuild. If you do not have that, stop and build it before Week 1; this exam has performance-based questions in a simulated shell and no amount of reading substitutes for having typed the commands.

1. Week 110-12 hrs

   Lab build and shell fundamentals

   • Install two VMs from different families — a RHEL derivative such as Rocky or AlmaLinux, and Ubuntu Server — so you see dnf and apt, firewalld and ufw side by side
   • Take a snapshot of each so you can break them freely and roll back
   • Filesystem hierarchy, navigation, globbing, pipes and redirection until they are reflex
   • Learn to read man pages properly, including the section numbers — the PBQ environment gives you them and nothing else
2. Weeks 2-311-13 hrs/week

   Domain 1 — System Management (23%)

   • Storage: partitioning, filesystem creation, mounting, /etc/fstab, LVM physical volumes through to logical volumes, and resizing
   • Package management on both families: dnf and rpm, apt and dpkg, repository configuration
   • Boot process and the bootloader, kernel parameters, and what actually happens between power-on and a login prompt
   • Containers as system management: run an image, map a port, mount a volume, inspect a running container
3. Weeks 4-510-12 hrs/week

   Domain 2 — Services and User Management (20%)

   • systemd properly: units, targets, timers, and the difference between start, enable and enable --now
   • Read failing units with systemctl status and journalctl -xeu until diagnosing a failed service is routine
   • Users, groups, /etc/passwd and /etc/shadow fields, password ageing, skeleton directories
   • Configure a real service end to end — SSH hardening, a web server, an NFS or Samba share — and then break it deliberately
4. Week 611-13 hrs

   Domain 3 — Security (18%)

   • Permissions in depth: octal and symbolic modes, umask, and the special bits — SUID, SGID and the sticky bit
   • Access control lists with getfacl and setfacl, and when they beat traditional permissions
   • SELinux contexts and booleans, and AppArmor profiles — know which distribution uses which and how to check enforcement mode
   • Firewalls: firewalld zones, nftables and ufw; PAM, sudoers configuration and SSH key authentication
5. Week 711-13 hrs

   Domain 4 — Automation, Orchestration and Scripting (17%)

   • Bash scripting: variables, conditionals, loops, functions, exit codes, and argument handling — write five real scripts, do not read about them
   • Python basics as the blueprint frames them: environments, packages, and simple automation scripts
   • Git workflow: clone, branch, commit, merge, tag, and resolving a conflict
   • Configuration management concepts (Ansible playbook structure), CI/CD pipeline concepts, and the AI-assisted coding practices new to V8
6. Week 811-13 hrs

   Domain 5 — Troubleshooting (22%)

   • Practise a fixed diagnostic order: is the service running, is it listening, is the firewall allowing it, are permissions and SELinux contexts correct, is there disk or inode exhaustion
   • Network troubleshooting: ip, ss, dig, traceroute, and reading /etc/resolv.conf and NetworkManager configuration
   • Performance: top, vmstat, iostat, free, and identifying whether the constraint is CPU, memory or I/O
   • Have someone else break your VM, or break it from a script you wrote last week and forgot the details of
7. Week 910-12 hrs

   Performance-based question rehearsal

   • Set yourself timed shell tasks with no internet: create an LVM volume and mount it persistently; add a user to a group with a specific shell; open a port in firewalld permanently
   • Do every task using only man pages and --help, because that is what the PBQ environment gives you
   • Time each one — PBQs are the main reason candidates run out of the 90 minutes
   • Write down every command you had to look up and drill those specifically
8. Week 1010-12 hrs

   Timed full exams and gap closing

   • Three full 90-minute practice exams, weighted to the five current domains rather than the retired four
   • Re-lab every miss rather than re-reading it
   • Final pass over the special permission bits, systemd verbs and firewall syntax — the three highest-density sources of cheap points
   • One quiet day before the exam

What to buy

Which study resources are worth paying for?

The important buying decision here is not which course but which version. XK0-005 material is still widely on sale and still ranks well in search results, and it covers a four-domain blueprint that no longer exists. Check for XK0-006 or "V8" on the cover of anything you buy. The other decision is whether to pay for CompTIA's own bundles, which add labs and a retake to the voucher at a significant premium.

Prices checked 2026-08 in USD before tax; CompTIA voucher pricing varies by region and promotion and Udemy list prices are close to meaningless outside a sale — confirm at the source before buying. We do not rank by commission.

What you'll face

What question types will I see?

A maximum of 90 questions in 90 minutes, in English, scored on a 100-900 scale with a 720 cut. The paper mixes multiple choice — both single-answer and multiple-response — with performance-based questions that drop you into a simulated Linux environment and give you a task to complete. PBQs are typically presented at the start and are weighted more heavily than individual multiple-choice items, but crucially you may skip them and return, so the presented order is not the order you should work in. The five current domains are System Management (23%), Troubleshooting (22%), Services and User Management (20%), Security (18%) and Automation, Orchestration and Scripting (17%). Because CompTIA equates forms, your scaled score is not a percentage of items correct and cannot be converted into one. The practical implication for pacing is simple: multiple-choice items should average well under a minute so that the PBQs, which can easily consume five minutes each, have somewhere to come from.

Samples are editor-written illustrations of the published blueprint, not live exam items.

Reference

What are the key facts about the CompTIA Linux+?

CompTIA Linux+ is a certification credential; awarded by CompTIA; the exam fee is $390 USD (CompTIA list; resellers often $330–369); typical preparation is 2–4 months of part-time study (faster with the recommended 12 months of experience); holders typically earn $65,000 – $95,000.

In short

Is the CompTIA Linux+ worth it?

• Linux+ (XK0-006) is a vendor-neutral, performance-based Linux administration exam — 90 minutes, up to 90 questions, pass mark 720/900.
• Four weighted domains: System Management 32%, Troubleshooting 28%, Security 21%, Scripting/Containers/Automation 19%.
• Standard exam voucher is $390 USD; the cert is valid 3 years and renewed via 50 CEUs in CertCentral.
• Ideal for junior Linux/cloud/DevOps roles and DoD 8140 IAT Level II; complements A+, Network+, Security+, and cloud certs.

Trust

Where does this information come from?

Everything above is taken from the awarding body's own published material. Fees, question counts and domain weights are revised regularly — check the official page before you pay.

• CompTIA Awarding body
• Official CompTIA Linux+ exam page Exam page

Research confidence: high · Last reviewed 2026-08