C++ Crash Course
Josh Lospinoso
Pluggable Authentication Modules
Kenneth Geisshirt
Cross-Site Scripting Attacks: Classification, Attack, and Countermeasures
B. B. Gupta and Pooja Chaudhary
SSH Mastery: OpenSSH, PuTTY, Tunnels and Keys
Michael W Lucas
Bash Idioms: Write Powerful, Flexible, Readable Shell Scripts
Carl Albing & J P Vossen