Learning the bash Shell
Cameron Newham
Practical Packet Analysis
Chris Sanders
Bash Cookbook
Carl Albing & JP Vossen
Linux Device Drivers
Jonathan Corbet & Alessandro Rubini & Greg Kroah-Hartman
Linux in a Nutshell
Ellen Siever & Stephen Figgins & Robert Love & Arnold Robbins
Learning the Vi and Vim Editors
Arnold Robbins & Elbert Hannah
grep Pocket Reference
John Bambenek & Agnieszka Klus
Docker: Up & Running
Sean P. Kane & Karl Matthias