Navigating the CompTIA certification landscape requires more than just theoretical knowledge; it demands a command of the Linux terminal that only comes from real-world practice. This curated selection of labs from the LabEx CompTIA learning path bridges the gap between exam objectives and professional IT environments. By focusing on security auditing, task automation, and precise text manipulation, these exercises provide the foundational skills necessary for any aspiring systems administrator or security analyst.
Checking Listening Ports for Security Audit
Difficulty: Beginner | Time: 15 minutes
In this lab, you will learn how to audit listening ports on a Linux system to minimize the attack surface. You will use the ss command to identify open ports and investigate suspicious processes.
Practice on LabEx → | Tutorial →
One-time Scheduling with at
Difficulty: Beginner | Time: 20 minutes
In this lab, you will learn how to schedule one-time tasks in Linux using the at command. You will practice installing the utility, scheduling jobs, listing pending jobs, and cancelling them.
Practice on LabEx → | Tutorial →
sed Stream Editing
Difficulty: Beginner | Time: 20 minutes
In this lab, you will learn how to use the sed stream editor to manipulate text files directly from the command line. You will practice deleting lines, removing empty lines, inserting headers, and printing specific ranges of lines without opening a text editor.
Practice on LabEx → | Tutorial →
sed Substitution Basics
Difficulty: Beginner | Time: 20 minutes
In this lab, you will learn the basics of sed substitution. You will practice replacing text strings in output streams and files, using global replacement flags, changing delimiters, and creating backups during in-place editing.
Practice on LabEx → | Tutorial →
Configuring the UFW Firewall
Difficulty: Beginner | Time: 20 minutes
In this lab, you will learn how to secure your Linux network by configuring the Uncomplicated Firewall (UFW). You will check the status, allow specific ports like 8080, and enable the firewall safely.
Practice on LabEx → | Tutorial →
The transition from an IT student to a certified professional is paved with hands-on experience. These five labs offer a concentrated dose of the practical skills required to excel in CompTIA exams and, more importantly, in the modern workplace. Start your journey today by diving into these scenarios and building the confidence that only comes from the command line.
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