Iptables Tutorial 1.2.2
Oskar Andreasson
Kubernetes: Up and Running
Kelsey Hightower & Brendan Burns & Joe Beda & Lachlan Evenson
Linux iptables Pocket Reference
Gregor N. Purdy
Ethical Hacker’s Penetration Testing Guide
Samir Kumar Rakshit
GitHub For Dummies
Sarah Guthals & Phil Haack
Linux Bible (10th edition)
Christopher Negus
Cyber Security and Network Security
Sabyasachi Pramanik & Debabrata Samanta & M. Vinay & Abhijit Guha