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 Any study material you find that references XK0-005 is out of date.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.