Linux+
CompTIA Linux+ (XK0-005)
CompTIA Linux+ (XK0-005) is the vendor-neutral Linux certification that validates the skills to configure, manage, secure, and troubleshoot Linux systems in enterprise environments. It covers system management, user and group administration, storage, networking, security (including SELinux and AppArmor), shell scripting, containers with Docker and Podman, and infrastructure automation — applicable across RHEL, Ubuntu, CentOS, and other distributions.
Linux+ Exam Overview
| Detail | Information |
|---|---|
| Full Name | CompTIA Linux+ (XK0-005) |
| Governing Body | CompTIA |
| Number of Questions | 90 |
| Time Limit | 90 minutes |
| Passing Score | 720/900 |
| Exam Fee | $358 USD |
| Category | IT Certifications |
| C3RT App Available On | iPhone, iPad, and Mac |
| Official Source | CompTIA official website ↗ |
Linux+ Content Areas and Domains
| Domain / Content Area | Exam Weight |
|---|---|
| System Management | 32% |
| Security | 21% |
| Scripting, Containers and Automation | 19% |
| Troubleshooting | 28% |
Domain weights are approximate and based on the CompTIA content outline. Always verify at the official source before your exam.
Topics Covered
- ✓ System Management — Linux commands, package management (apt, dnf, yum), systemd, boot process
- ✓ Security — file permissions, sudo, SELinux/AppArmor, firewalld/iptables, SSH hardening
- ✓ Scripting, Containers & Automation — Bash scripting, Docker/Podman containers, Ansible basics
- ✓ Troubleshooting — system logs (journalctl), networking (ip, ss, netstat), performance tools (top, htop, iostat)
How C3RT Helps You Pass the Linux+
Adaptive Practice
Questions adapt to your weak areas automatically so every study session on the Linux+ is time well spent.
Diagnostic Mocks
Full-length mock exams timed to the real Linux+ format with detailed score breakdowns by topic.
Mistake Bank
Every wrong answer is saved for targeted re-drill. The system resurfaces your mistakes until they stick.
Native on iOS & Mac
Built with SwiftUI, not a web wrapper. Instant load, offline support, hardware-speed rendering.
Linux+ Frequently Asked Questions
What does Linux+ stand for?
Linux+ stands for CompTIA Linux+ (XK0-005). It is administered by CompTIA.
Who administers the Linux+?
The CompTIA Linux+ (XK0-005) (Linux+) is administered by CompTIA. For official information, visit the CompTIA website.
How many questions is the Linux+?
The Linux+ consists of 90 questions. Candidates are given 90 minutes to complete the exam.
What is the passing score for the Linux+?
The passing score for the Linux+ is 720/900, as set by CompTIA. Scoring methodology and passing standards may be updated periodically. Always verify current requirements with the governing body.
How much does the Linux+ exam cost?
The Linux+ exam fee is $358 USD. This fee is set by CompTIA and may vary by testing centre, region, or membership status. Additional fees for registration or rescheduling may apply.
How does Linux+ compare to RHCSA?
CompTIA Linux+ is multiple choice and vendor-neutral, covering concepts across multiple Linux distributions (RHEL, Ubuntu, Debian). RHCSA is performance-based on a live RHEL system — harder, RHEL-specific, and more respected for Red Hat environments. Linux+ is better for generalist Linux roles; RHCSA is preferred for enterprise Linux/RHEL-specific jobs. RHCSA commands a higher salary premium.
What Linux distributions does Linux+ cover?
Linux+ is vendor-neutral and covers concepts applicable to all major Linux distributions. The exam may reference RHEL/CentOS (rpm, dnf/yum, firewalld), Debian/Ubuntu (dpkg, apt, ufw), and general Linux tools. You should be comfortable with both RPM and DEB-based package management and understand distribution-specific security tools like SELinux (RHEL) and AppArmor (Ubuntu).
What containers knowledge does Linux+ test?
Linux+ XK0-005 tests Docker and Podman container basics — creating and managing containers, building images from Dockerfiles, networking containers, volume mounts, and running containers as services via systemd. It also covers container security concepts. This reflects the shift toward containerized workloads in Linux environments.
Is Linux+ recognized by the DoD?
Yes — CompTIA Linux+ is approved under DoD 8140/8570 for Technical Level II (IAT Level II) roles. This makes it a recognized credential for Linux system administration roles in defense environments. Combined with Security+, Linux+ helps meet DoD baseline certification requirements for privileged access roles on Linux systems.
How difficult is the CompTIA Linux+ exam?
CompTIA Linux+ (XK0-005) is considered intermediate in difficulty and is performance-based as well as multiple choice. It covers Linux administration, scripting, security, and kernel management. Candidates with practical Linux administration experience and 2–3 months of preparation typically perform well.
What are the eligibility requirements for CompTIA Linux+?
There are no mandatory prerequisites. CompTIA recommends CompTIA A+ and Network+ plus 12 months of Linux administration experience before attempting Linux+. Prior Linux familiarity through a home lab or education is strongly advised.
How long should I study for CompTIA Linux+?
Most candidates need 2–3 months of preparation, including hands-on practice with Linux command line, file system management, and scripting. A virtual machine lab environment running CentOS or Ubuntu is an essential study tool alongside practice exams.
What career value does CompTIA Linux+ provide?
Linux+ validates the foundational skills needed for Linux systems administration roles across on-premises and cloud environments. Linux admins with this certification typically earn $55,000–$80,000+. The credential is vendor-neutral and covers both RHEL-based and Debian-based distributions.
What is the CompTIA Linux+ retake policy?
No waiting period for the first retake; a 14-day wait applies after a second failure and for subsequent attempts. Standard CompTIA CE policies apply.
How long is CompTIA Linux+ valid?
Linux+ is valid for three years under the CompTIA CE program. It renews through 30 CEUs or by passing the current exam version.
What continuing education is required for CompTIA Linux+ renewal?
Renewal requires 30 CEUs over three years. Linux-specific training, open-source conferences, and professional Linux administration courses all count toward CEU requirements.
Is CompTIA Linux+ recognized for DoD 8570 roles?
Yes, CompTIA Linux+ is recognized under DoD 8570.01-M for certain computing environment roles, particularly those requiring Linux operating system expertise. This makes it strategically valuable for candidates pursuing federal IT positions that involve Linux infrastructure.
C3RT is a native iOS and macOS exam preparation platform covering the CompTIA Linux+ (XK0-005) (Linux+), a IT Certifications certification, administered by CompTIA. C3RT is not affiliated with or endorsed by CompTIA. Certification names and trademarks are the property of their respective organisations. For official exam registration, eligibility requirements, and content outlines, visit the CompTIA official website ↗ .