Training course
This is a free, self-paced reading course for CompTIA Linux+ (XK0-006), the vendor-neutral credential for configuring, securing, automating, and troubleshooting Linux systems on the ground where they actually run: on-premises servers, hybrid cloud, and containerized platforms. It is written to be read straight through, in order, before you start drilling practice questions, so that a missed item becomes a gap you can name rather than a command flag you memorize.
The course is organized as one module per official exam domain, in the order CompTIA publishes them for V8, and each module carries the domain’s published weight. That structure matters more on this exam than on most, because XK0-006 is not evenly distributed: System Management and Troubleshooting together account for close to half the exam, and they account for close to half of this course. It is also a genuinely new outline. V8 added Services and User Management as a domain in its own right and pulled containers, Python, Git, and configuration management into scope, so a course built on XK0-005 material would leave you short in exactly the places the exam has grown.
What the course covers
System Management
Module 1 · 23%The foundation layer: installing and booting Linux, managing packages and repositories, carving up storage with partitions and LVM, loading kernel modules, keeping time in sync, and reading a system’s vital signs through logs and monitoring tools. If it keeps a server standing, it is covered here.
Services and User Management
Module 2 · 20%New to V8 as a domain in its own right. This is the day-to-day of running things other people depend on, creating and governing user accounts and groups, driving services with systemd, configuring networking, and operating containers with Docker and Podman, from pulling images through to persistent volumes and container networks.
Security
Module 3 · 18%Locking a system down without breaking it: permissions and ACLs, SELinux and AppArmor, firewalls from iptables and nftables through to UFW, hardened SSH and sudo, password policy and MFA, plus encryption, hashing, certificates, and auditing. V8 threads security through realistic administration tasks rather than treating it as an isolated checklist.
Automation, Orchestration, and Scripting
Module 4 · 17%The smallest domain by weight and the one that changed most. Bash scripting is still the backbone (variables, conditionals, loops, exit codes, and the grep/sed/awk text-processing toolkit) now joined by basic Python, Git version control, infrastructure-as-code concepts, configuration management with Ansible and Puppet, and responsible use of AI-assisted tooling.
Troubleshooting
Module 5 · 22%Where everything above gets tested under pressure: boot failures, full disks and exhausted inodes, saturated CPUs and runaway I/O, broken name resolution, misfiring services, SELinux denials, degraded RAID arrays, and network paths that stop one hop short, with cloud and hybrid context woven through the scenarios.
How to use it
Read a module, then test that domain immediately rather than waiting until you have covered everything. The free Linux+ sample questions are the quickest way to check whether a module landed, and the full-length blueprint-weighted exam sits on the XK0-006 certification guide alongside the exam logistics, question count, timing, and the 720 / 900 scaled cut score. Reading the course itself requires a free Certifym account.
Read it next to a terminal. XK0-006 leans harder on performance-based questions than any previous Linux+ version, and those questions drop you into a terminal-style scenario with the clock running, roughly a minute per item across the sitting. CompTIA recommends about twelve months of hands-on Linux experience for a reason. Spin up a virtual machine and run every command as you read about it: mount the volume, write the unit file, set the SELinux context, break it, and fix it. That is the difference the exam measures.
What CompTIA Linux+ Is
CompTIA Linux+ is a vendor-neutral, intermediate-level certification that validates the practical skills of a working Linux administrator. The current version is XK0-006, also called V8, which launched on July 15, 2025 and became the only active version when the previous XK0-005 retired on January 13, 2026. Any study material you find that references XK0-005 is out of date. This course targets the current XK0-006 objectives.
CompTIA's audience profile assumes roughly 12 months of hands-on experience with Linux servers, typically in a junior Linux administrator, cloud engineer, or DevOps support role. Prior CompTIA A+, Network+, and Server+ are recommended but not required. Nobody passes this exam from theory alone — the performance-based questions are practical scenarios in a simulated terminal, and CompTIA writes them assuming you've spent time actually breaking and fixing a Linux system in a lab.
Exam format at a glance
- Exam code: XK0-006 (V8)
- Questions: up to 90
- Length: 90 minutes
- Question types: multiple choice, multiple response, and performance-based questions (PBQs) that simulate a Linux terminal
- Passing score: 720 on a 100–900 scale (roughly 80%)
- Delivery: Pearson VUE testing center or online proctored
- Validity: three years, renewable with CEUs or re-examination
The five domains
XK0-006 has five weighted domains that structure the entire exam and this course:
- System Management — 23%. Boot process, filesystem hierarchy, storage, package management, virtualization, backups, kernel modules.
- Services and User Management — 20%. systemd, users and groups, permissions, scheduled jobs, containers.
- Security — 18%. AAA, firewalls, hardening, SELinux/AppArmor, cryptography, compliance.
- Automation, Orchestration, and Scripting — 17%. Bash, Python, Git, Ansible, Puppet, CI/CD, AI-assisted best practices.
- Troubleshooting — 22%. Diagnosing and resolving system, network, storage, performance, and security issues.
Two takeaways from those weightings. First, System Management and Troubleshooting together account for 45% of the exam — the practical, hands-on core. Second, the domains interlock: a troubleshooting scenario about a failed service will touch systemd (domain 2), the firewall (domain 3), and log analysis (domain 5) all at once. This course teaches the topics in domain order but calls out those cross-links as they come up.
How to use this course
Each lesson is designed to be a focused reading of about five to ten minutes with a companion command-line examples set. Follow along in a real Linux VM — Ubuntu, Rocky Linux, or Fedora are all fine — because typing the commands is where the muscle memory forms. When you finish the course, sit the bundled Linux+ practice exam to confirm readiness. If you consistently score above 85% on the practice bank, you're ready for the real thing.
Frequently asked questions about the Linux+ training course
Is the Linux+ training course free?
Yes. The course costs nothing to read; it is behind a free Certifym account, with no payment and no card. It is funded by the same practice-exam catalog it sits alongside.
How is the course structured?
One module per official XK0-006 exam domain, in CompTIA’s published order, with each module weighted to the domain’s published percentage: 23%, 20%, 18%, 17%, and 22%. Within each module the material is broken into short lessons, followed by key terms and further reading.
Does this replace CompTIA’s official training?
No. CompTIA publishes the authoritative XK0-006 exam objectives along with its own CertMaster courseware, and those are the reference of record. This course is an independent study companion, written to be read quickly and to slot alongside practice questions.
Do I need experience before starting?
There is no enforced prerequisite, but CompTIA recommends about twelve months of hands-on Linux experience, and the exam is built on that assumption. Most candidates arrive after A+ or Network+, which cover the hardware, operating-system, and networking fundamentals Linux+ takes as read. If you are missing the networking half of that foundation, work through the Network+ course first.
What should I do after finishing the course?
Move to blueprint-weighted practice questions and keep going until you are clearing the bar consistently in all five domains rather than leaning on System Management. Watch Troubleshooting in particular: at 22% it re-tests every other domain, so a weak score there usually points at a gap somewhere else. Then book the exam through Pearson VUE.
Is the course written for XK0-006 or the older XK0-005?
XK0-006. The V8 exam launched in July 2025 and XK0-005 retired on January 13, 2026, so V8 is the only version you can register for. This course follows the V8 objectives, including the new Services and User Management domain and the container, Python, Git, and configuration-management material V7 did not have. CompTIA can revise objectives at any time; verify the current ones on the CompTIA site before you schedule.
Trademark notice & independence. Certifym.net is operated by Certifym Exam Services, LLC and is not affiliated with, endorsed by, or sponsored by CompTIA, Inc. CompTIA® and Linux+® are registered trademarks of CompTIA, Inc. Use of these marks is solely to identify the certification for which these study materials are intended. The XK0-006 exam objectives, including the domain titles and weightings referenced above, are the property of CompTIA, Inc.; candidates should download the complete, official objectives directly from CompTIA at comptia.org.
All course content, questions, answers, and explanations on Certifym are original content created for study purposes. They are not actual CompTIA training materials or examination questions and are not represented as such. Studying with these materials does not guarantee a passing result on any live certification exam. Exam requirements, format, domain weights, pricing, and renewal policies are set by CompTIA and may change; always verify current details on the CompTIA site before scheduling your exam.