Understanding the Linux Kernel: From I/O Ports to Process Management

Just for Fun: The Story of an Accidental Revolutionary

Kali Linux Hacking: A Complete Step by Step Guide to Learn the Fundamentals of Cyber Security, Hacking, and Penetration Testing. Includes Valuable Basic Networking Concepts.

Bash Pocket Reference: Help for Power Users and Sys Admins

Linux Device Drivers: Where the Kernel Meets the Hardware

Red Hat Enterprise Linux 9 Administration: A comprehensive Linux system administration guide for RHCSA certification exam candidates, 2nd Edition

Mastering Linux Administration: Take your sysadmin skills to the next level by configuring and maintaining Linux systems

Ubuntu Linux Bible

Linux for Beginners: Why You're Not Using Linux yet and How to Overcome Command Line Fear

Cybersecurity for Small Networks: A Guide for the Reasonably Paranoid