The Complete Metasploit Guide
Sagar Rahalkar
Linux Advanced Routing and Traffic Control HOWTO
Gregory Maxwell & Remco Mook & Martijn Oosterhout & Paul Schroeder & Jasper Spaans & Bert Hubert
Mastering Linux Network Administration
Jay LaCroix
Zabbix 5 IT Infrastructure Monitoring Cookbook
Nathan Liefting & Brian van Baekel
The Cybersecurity Self-Help Guide
ARUN. SONI