CompTIA Linux+ (XK0-004) Exam Prep 2026

Learn to install, update, and remove software on RHEL and Debian-based systems. Includes repository configuration tips.

Stop guessing and start controlling services. We'll cover systemctl, journalctl, and enabling services to start on boot.

A practical look at useradd, usermod, and userdel, including managing password policies and aging.

Automate your backups and jobs. We'll show you how to write crontabs and schedule one-off tasks correctly.

Use ps, top, and kill to manage running processes. Learn to identify resource hogs and troubleshoot performance.

Set up key-based authentication and harden your SSH server. A must-know for any Linux professional.

Where to find logs and how to read them. We'll configure logrotate to manage disk space effectively.

Write a simple automation script from scratch. Includes variables, conditionals, and making scripts executable.

Powerful tools for the exam and the job. We'll show you common search-and-replace and reporting tasks.

Hands-on guide to firewalld and iptables. Learn to open ports and block traffic with confidence.

Don't fear SELinux. We'll break down how to check status, change contexts, and troubleshoot access denials.

Use nmcli and ip commands to set up networking. Includes ping, netstat, and ss for connection diagnostics.

A step-by-step method to fix name resolution issues using dig, host, and checking /etc/resolv.conf.

From physical volumes to logical volumes. A deep dive into creating flexible storage that can grow with your needs.

Learn to mount devices manually and configure /etc/fstab for persistent mounts across reboots.

Understand these special permissions and when to use them, with a focus on security best practices.

Learn to load, unload, and check kernel modules. We'll also touch on basic sysctl parameters for performance.

Functions, loops, and error handling. Build a more complex script to automate a multi-step admin task.

Basic queries to interact with databases. This lesson covers what you need for the exam objectives.

Brief overview of working with Linux instances on major cloud platforms and managing cloud-init.

Install and configure a basic web server. We'll cover virtual hosts and checking for common configuration errors.

Set up file sharing for legacy and Windows-compatible systems. Includes security considerations.

Use tools like rsync and tar to create reliable backups. We'll also cover verifying and restoring from those backups.

Identify bottlenecks using vmstat and iostat. Learn what to look for and what actions to take.

A checklist-style lesson covering key steps to secure a new server before putting it into production.

How to structure your remaining study time effectively. We'll help you prioritize weak areas.

We'll tackle a set of practice questions, explaining the reasoning behind each correct answer.

Another set of challenging questions, focusing on performance-based scenarios and troubleshooting.

Quick-fire exercises to build muscle memory for the most common exam commands.

A list of the most frequent mistakes students make on the XK0-004 and how to sidestep them.

A rapid-fire review of the acronyms you must know for the exam. Downloadable flashcard set included.

What to do the day before and day of the exam. From ID requirements to mental preparation.

A walkthrough of the testing environment, question types, and how to manage your time during the test.

Where to go from here. We'll discuss specializations like DevOps, cloud engineering, and security.

A quick summary of what you've accomplished and how to access the community and future updates.