Про криптографию
Виктор де Касто
NGINX Cookbook
Derek Dejonghe
Absolute FreeBSD
Michael Warren Lucas
Wireless Hacking with Kali Linux
Hugo Hoffman
sed & awk
Dale Dougherty & Arnold Robbins
Linux iptables Pocket Reference
Gregor N. Purdy
Effective DevOps
Jennifer Davis & Ryn Daniels