Linux From

Independently published

Linux for Beginners: Master Linux from Scratch!  

Mastering Debian Linux: From Beginner to Advanced (English Edition)

Independently published

Linux Firewalls: From Basics to Advanced Techniques

Packt Publishing

Mastering Linux Security and Hardening: A practical guide to protecting your Linux system from cyber attacks, 3rd Edition

Linux Essentials : A Book that every Linux Beginners should read (Linux from Scratch 1) (English Edition)

Linux: From Installation to Advanced System Administration: Ubuntu (Computer Programming Book 9) (English Edition)

LINUX Command-Line for Beginners: A Comprehensive Step-by-Step Starting Guide to Learn Linux from Scratch to Bash Scripting and Shell Programming (English Edition)

Rheinwerk Computing

Linux: The Comprehensive Guide to Mastering Linux—From Installation to Security, Virtualization, and System Administration Across All Major Distributions (Rheinwerk Computing) (English Edition)

Packt Publishing

The Embedded Linux Security Handbook: Fortify your embedded Linux systems from design to deployment

O.H.S

MASTERING LINUX: FROM ZERO TO RHCSA (English Edition)