Linux Security for DevOps: Audit, Harden & Protect Linux

Why Linux Security Matters

Linux powers modern infrastructure, cloud platforms, containers, and enterprise applications. Whether you're a Linux administrator, DevOps engineer, SRE, or IT professional, understanding how to secure Linux systems is a critical skill in today's environments.

In this course, you'll learn practical Linux security concepts and gain hands-on experience with the tools commonly used to assess, monitor, harden, and troubleshoot Linux systems.

We'll begin with the fundamentals of Linux security, including defense in depth, least privilege, detection and monitoring, and a practical security assessment workflow. These concepts will help you understand not only how security tools work, but when and why to use them.

From there, we'll use real-world demonstrations to assess, monitor, harden, and troubleshoot Linux systems using industry-standard security tools.

What You'll Learn

1. Discover open ports, services, and attack surfaces with Nmap, ss, and lsof

2. Assess Linux security posture using Lynis and OpenSCAP

3. Secure Linux firewalls using UFW, iptables, and nftables

4. Protect systems against common attacks using Fail2ban

5. Secure Linux systems with SELinux through practical, hands on examples

6. Work with certificates, encryption, and TLS using OpenSSL

7. Monitor security events using Auditd and Journalctl

8. Investigate security incidents using Ausearch

9. Detect malware, rootkits, and signs of compromise using ClamAV and Rkhunter

10. Validate and troubleshoot security controls using Netcat and Tcpdump

Who This Course Is For

This course focuses on practical learning rather than theory alone. Every tool is demonstrated in a Linux environment so you can follow along and apply the techniques in your own lab, workplace, or cloud environment.

By the end of this course, you'll understand how security professionals approach Linux security, identify risks, monitor systems effectively, investigate security events, and use industry-standard tools to improve your security posture.

Whether you're a Linux administrator, DevOps engineer, SRE, cybersecurity student, or IT professional, this course will help you build practical Linux security skills that you can apply immediately in real-world environments.