The Book of PF, 4th Edition: A No-Nonsense Guide to the OpenBSD Firewall
The Linux Command Line, 3rd Edition: A Complete Introduction
The Ultimate Kali Linux Book: Harness Nmap, Metasploit, Aircrack-ng, and Empire for cutting-edge pentesting
Linux Basics for Hackers, 2nd Edition: Getting Started with Networking, Scripting, and Security in Kali
How Linux Works, 3rd Edition: What Every Superuser Should Know
Linux for Absolute Beginners: An Introduction to the Linux Operating System, Including Commands, Editors, and Shell Programming
The Kubernetes Book
Linux: The Quick and Easy Beginners Guide to Learning the Linux Command Line (Linux in 3 Days Book 1)