Linux

Brand: O'Reilly Media

sed & awk

Richard E Silverman

Git Pocket Guide: A Working Introduction

Assembly Language Step-by-step: Programming with Linux

Jerry D Peek

Learning the UNIX Operating System, Fifth Edition

Richard Blum Christine Bresnahan

Linux Essentials

Brand: O'Reilly Media

Managing Projects with GNU Make: The Power of GNU Make for Building Anything (Nutshell Handbooks)

Independently Published

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.

O'Reilly Media

Linux Pocket Guide: Essential Commands