Pluggable Authentication Modules
Kenneth Geisshirt
Cyber Security and Network Security
Sabyasachi Pramanik & Debabrata Samanta & M. Vinay & Abhijit Guha
Practical Python Security
Dennis Byrne
SSH Mastery: OpenSSH, PuTTY, Tunnels and Keys
Michael W Lucas
Ubuntu Linux Unleashed 2021 Edition
Matthew Helmke