Metasploit: The Penetration Tester's Guide
David Kennedy, Jim O'Gorman, Devon Kearns, Mati Aharoni
Unix Power Tools
Shelley Powers
Learning the Vi and Vim Editors
Arnold Robbins & Elbert Hannah
Cybersecurity Ops with bash
Paul Troncone & Carl Albing Ph.D.
But how Do it Know?
J. Clark Scott