Linux Advanced Routing and Traffic Control HOWTO
Gregory Maxwell & Remco Mook & Martijn Oosterhout & Paul Schroeder & Jasper Spaans & Bert Hubert
Quick Start Guide to Penetration Testing
Sagar Rahalkar
tmux (for Diego Cohen)
Brian P. Hogan
Practical LXC and LXD
Senthil Kumaran S.
The Cybersecurity Self-Help Guide
ARUN. SONI