bash Idioms: Write Powerful, Flexible, Readable Shell Scripts

Effective awk Programming: Universal Text Processing and Pattern Matching, Edition 4

sed & awk: UNIX Power Tools, Edition 2

Bash Pocket Reference: Help for Power Users and Sys Admins, Edition 2

Classic Shell Scripting: Hidden Commands that Unlock the Power of Unix

sed and awk Pocket Reference: Text Processing with Regular Expressions, Edition 2

Learning the bash Shell: Unix Shell Programming, Edition 3

Linux System Programming: Talking Directly to the Kernel and C Library, Edition 2

Linux Kernel Development: Edition 3

Linux Basics for Hackers: Getting Started with Networking, Scripting, and Security in Kali

Penetration Testing with Raspberry Pi

DevOps Troubleshooting: Linux Server Best Practices

Linux Device Drivers: Where the Kernel Meets the Hardware, Edition 3

The Design and Implementation of the FreeBSD Operating System: Edition 2

UNIX and Linux System Administration Handbook: Edition 5

Learning the vi and Vim Editors: Power and Agility Beyond Just Text Editing, Edition 8

vi Editor Pocket Reference

Easy Linux Device Driver, Second Edition: First Step Towards Device Driver Programming

Linux in a Nutshell: A Desktop Quick Reference, Edition 6