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Free CompTIA Linux+ Practice Test 2026
Master Linux administration with our current Linux+ exam practice questions. Covering system management, security, containers, automation, and troubleshooting—the core skills needed for modern Linux environments and DevOps roles.
Linux+: plan your preparation
Master the CompTIA Linux+ certification with comprehensive practice questions covering Linux administration, command line, scripting, security, and system management.
The CompTIA Linux+ certification validates essential skills for Linux system administrators. This vendor-neutral certification covers Linux administration, command-line proficiency, security, scripting, and system management. Linux powers the majority of servers, cloud infrastructure, and IoT devices, making Linux skills highly valuable across industries. Our practice questions cover all exam objectives including system configuration, security, scripting and automation, and troubleshooting.
Exam version and format
Linux+ V8 uses exam XK0-006: up to 90 multiple-choice and performance-based questions in 90 minutes, with a passing score of 720/900. Use the five-domain outline below when planning current preparation.
Checked September 8, 2026. Read the official Linux+ exam guidance before booking.
Current exam outline
- System Management: 23%
- Services and User Management: 20%
- Security: 18%
- Automation, Orchestration, and Scripting: 17%
- Troubleshooting: 22%
Linux+ Exam Quick Facts
| Exam Code | Latest version |
| Full Name | CompTIA Linux+ |
| Number of Questions | Up to 90 (MCQ + PBQ) |
| Exam Duration | 90 minutes |
| Passing Score | 720 (on 100-900 scale) |
| Exam Cost | Check current provider pricing |
| Validity Period | 3 years |
| Renewal | 30 CEUs or higher cert |
| Prerequisites | None (A+ and 12 months experience recommended) |
| DoD role requirements | Check the current 8140 matrix and employer requirements |
| Average Salary | Varies by role, location, and experience |
Linux+ Practice Topics
The current Linux+ exam tests five domains, listed in the current exam outline above. The topic groups below organize Linux administration skills for practice.
⚙️ System Management
Topics: Package management (apt, dnf, zypper), storage configuration (LVM, RAID, filesystems), process management, systemd services, kernel modules, scheduling (cron, at).
Key Commands: systemctl, journalctl, lsblk, fdisk, mount, crontab
🔒 Security
Topics: User/group management, file permissions (chmod, chown, ACLs), SELinux/AppArmor, firewall configuration (firewalld, iptables, nftables), SSH hardening, PAM.
Key Commands: useradd, chmod, setfacl, getenforce, firewall-cmd
📦 Scripting, Containers & Automation
Topics: Bash scripting, Git version control, Docker/Podman containers, container orchestration basics, infrastructure as code concepts, CI/CD pipelines.
Key Commands: docker/podman, git, bash scripting, grep, awk, sed
🔧 Troubleshooting
Topics: Boot process issues, network troubleshooting, storage problems, performance tuning, log analysis, CPU/memory/disk diagnostics.
Key Commands: dmesg, top/htop, netstat/ss, df, du, free, vmstat
Ready to Master Linux Administration?
Practice with questions designed by Linux professionals covering the current Linux+ exam domains.
Start Practice Test →Essential Linux Commands for the current Linux+ exam
The Linux+ exam tests your knowledge of exact command syntax. Here are critical commands organized by domain.
📦 Package Management
# Debian/Ubuntu apt update && apt upgrade apt install package_name dpkg -l | grep package # RHEL/CentOS/Fedora dnf check-update dnf install package_name rpm -qa | grep package
⚙️ Systemd Services
systemctl status sshd systemctl enable --now nginx systemctl restart httpd journalctl -u sshd -f systemctl list-units --failed
💾 Storage & LVM
lsblk -f fdisk /dev/sdb pvcreate /dev/sdb1 vgcreate vg01 /dev/sdb1 lvcreate -L 10G -n lv01 vg01 mkfs.xfs /dev/vg01/lv01
🔐 Permissions & ACLs
chmod 755 script.sh chown user:group file setfacl -m u:user:rwx file getfacl file chattr +i immutable_file
🐳 Container Commands
docker pull nginx:latest docker run -d -p 80:80 nginx docker ps -a docker exec -it container bash podman build -t myapp.
🔍 Troubleshooting
top -bn1 | head -20 free -h df -h ss -tulnp journalctl -p err --since today
Sample Linux+ Practice Question
Question: A Linux administrator needs to create a new logical volume named "data" with 20GB of space from an existing volume group called "vg_storage". Which command should be used?
A) vgcreate -L 20G -n data vg_storage
B) lvcreate -L 20G -n data vg_storage
C) lvextend -L 20G vg_storage/data
D) pvcreate -L 20G -n data vg_storage
Show Answer
✓ B) lvcreate -L 20G -n data vg_storage
The lvcreate command creates logical volumes from existing volume groups. The -L flag specifies size, -n specifies the name, and the last argument is the volume group. vgcreate creates volume groups, lvextend extends existing LVs, and pvcreate creates physical volumes.
Linux+ vs RHCSA: Which to Choose?
| Aspect | CompTIA Linux+ | Red Hat RHCSA |
|---|---|---|
| Vendor | CompTIA (vendor-neutral) | Red Hat (vendor-specific) |
| Exam Format | MCQ + Performance-based | 100% hands-on practical |
| Duration | 90 minutes | 3 hours |
| Difficulty | Intermediate | Intermediate-Advanced |
| Cost | Check current provider pricing | Check current provider pricing |
| Best For | Multi-distro environments, DoD | RHEL/CentOS shops, enterprise |
| Containers | Docker and Podman | Podman focus |
| Next Step | Cloud+, DevOps certs | RHCE (Ansible automation) |
Linux Administration Practice
Questions aligned with the latest Linux+ exam objectives covering containers, Git, and cloud deployment.
Hands-On Focus
Practice command-line scenarios that mirror real exam performance-based questions.
Government Role Requirements
Linux+ is approved for IAT Level I positions, valuable for government and defense contractor roles.
Vendor-Neutral Skills
Learn skills applicable to any Linux distribution—Ubuntu, RHEL, CentOS, Debian, SUSE, and more.
Career Opportunities with Linux+
Career paths to explore: Linux+ skills can support preparation for diverse IT roles:
🖥️ Linux System Administrator
Salary: varies by role, location, and experience
Manage Linux servers, automate tasks, ensure uptime, and implement security patches across enterprise environments.
☁️ DevOps Engineer
Salary: varies by role, location, and experience
Linux+ provides the foundation. Add Docker, Kubernetes, and CI/CD skills to transition into high-demand DevOps roles.
🔐 Security Administrator
Salary: varies by role, location, and experience
Linux security knowledge (SELinux, firewalls, hardening) is essential for security roles protecting enterprise infrastructure.
🏢 Cloud Engineer
Salary: varies by role, location, and experience
Most cloud workloads run on Linux. Combine Linux+ with AWS/Azure/GCP certifications for cloud architecture roles.
Who should study Linux+?
- IT professionals working with Linux systems who need a vendor-neutral certification validating their administration skills
- System administrators managing Linux servers in enterprise, cloud, or hybrid environments
- DevOps engineers and cloud engineers who work daily with Linux-based infrastructure and automation
- Help desk professionals and Windows administrators looking to expand their skills into Linux administration
- Students pursuing careers in system administration, DevOps, or cloud engineering where Linux is the dominant operating system
Build your Linux+ study plan
- Practice system management and troubleshooting on a Linux command line. Also cover services and users, security, and automation using the current five-domain outline.
- Set up a Linux virtual machine (Ubuntu or CentOS/Rocky Linux) and practice every command and concept you study — Linux+ rewards practical experience.
- Master file permissions (chmod, chown, chgrp), process management (ps, top, kill, systemctl), and package management (apt, yum/dnf) — these are fundamental and heavily tested.
- Learn bash scripting: variables, loops, conditionals, functions, and text processing with grep, sed, and awk. Add Python, orchestration, and version control for the current automation domain.
- Practice containers with Docker or Podman, including images, storage, and networking. Relate this work to services and user management in the current Linux+ outline.
Skills to review
- System Management
- Manage users and groups, configure file permissions and ownership, manage software packages, and configure system services.
- Security
- Implement security best practices, configure firewalls (iptables/nftables), manage SELinux/AppArmor, and secure Linux systems.
- Scripting, Containers, and Automation
- Write bash scripts, use version control, manage containers with Docker and Podman, and implement automation.
- Troubleshooting
- Analyze and troubleshoot storage, network, firewall, CPU/memory issues, and user access and file permission problems.
Try these Linux+ knowledge questions
Choose your answer, then review the explanation. These are independent learning examples, not official exam questions or a replacement for hands-on labs.
Frequently Asked Questions
What is the Linux+ exam format?
The Linux+ exam has up to 90 questions including multiple-choice and performance-based questions. You have 90 minutes to complete it. The passing score is 720 on a scale of 100-900. PBQs typically appear at the beginning of the exam.
What are the prerequisites for Linux+?
There are no mandatory prerequisites, but CompTIA recommends A+ certification and 12+ months of hands-on Linux administration experience. You should be comfortable with the command line before attempting this exam.
What domains does Linux+ cover?
System Management (23%); Services and User Management (20%); Security (18%); Automation, Orchestration, and Scripting (17%); Troubleshooting (22%)
How does Linux+ compare to RHCSA?
Linux+ is vendor-neutral with multiple-choice and performance-based questions, covering general Linux knowledge applicable to any distribution. RHCSA is Red Hat-specific and 100% hands-on performance-based. RHCSA is generally considered harder but more specialized to Red Hat environments.
How much does Linux+ cost?
Check the official Linux+ page for current exam pricing in your region. Budget separately for training, lab access, taxes, and any retake. Package prices vary. Linux+ requires one exam, unlike the two-exam CompTIA A+ pathway.
How long is Linux+ certification valid?
Linux+ is valid for three years. Renew through eligible CompTIA routes or earn 50 CEUs during the cycle. CEU uploads require the applicable continuing education fee. Check the current renewal options rather than assuming another certification automatically renews Linux+.
What happens if I fail Linux+?
CompTIA requires no wait between your first and second attempts. Before the third or any later attempt, wait at least 14 calendar days from your last attempt. Pay for each attempt unless your purchased bundle includes an eligible retake. Review your score report and practice the weak objectives before booking again.
Is Linux+ DoD approved?
Linux administration skills are useful in government and defense contractor roles. Check the current DoD 8140 qualification matrix and the specific employer requirements; do not assume Linux+ qualifies for a particular role.
What's new in the current Linux+ exam?
The current XK0-006 exam organizes Linux skills into five domains. Containers (Docker and Podman), Git, cloud deployment, automation, and orchestration remain useful study topics. Use its current objectives to check the required depth and tools.
Is Linux+ easier than RHCSA?
Linux+ is generally considered easier than RHCSA. Linux+ uses multiple-choice and performance-based questions, while RHCSA is entirely performance-based on a live system. However, Linux+ covers a broader range of topics across multiple distributions.
What career paths does Linux+ support?
Linux+ supports careers in Linux system administration, DevOps engineering, cloud engineering, site reliability engineering, and cybersecurity. Linux skills apply to many server and cloud environments.
Do I need an account to use these samples?
You can read these examples without an account. Create an account to save progress in Smart Practice. The Free plan includes 15 questions per day; see Pricing for current plan features.
Can I study Linux+ on my phone?
This page works on a phone, tablet, or computer. Review the examples between longer study sessions. Use a suitable lab environment for hands-on configuration and troubleshooting.
Which Linux distribution should I use to study?
Linux+ is vendor-neutral. Practice with both a Debian-based distribution such as Ubuntu and a Red Hat-based distribution such as Rocky Linux. Learn differences in package management and system tools, and use the current exam objectives to choose lab tasks.