NGINX Cookbook
Derek Dejonghe
The the Complete Metasploit Guide
Sagar Rahalkar & Nipun Jaswal
Mastering Linux Administration
Alexandru Calcatinge & Julian Balog
How Linux Works, 3rd Edition
Brian Ward
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