Practical Python Security
Dennis Byrne
Bash Idioms: Write Powerful, Flexible, Readable Shell Scripts
Carl Albing & J P Vossen
CyBOK
Awais Rashid & Howard Chivers & George Danezis & Emil Lupu & Andrew Martin
Mastering Linux Administration
Alexandru Calcatinge & Julian Balog
tmux (for Diego Cohen)
Brian P. Hogan