Practical Linux Forensics
Bruce Nikkel
Offensive Shellcode from Scratch
Rishalin Pillay
The the Complete Metasploit Guide
Sagar Rahalkar & Nipun Jaswal
SSH Mastery: OpenSSH, PuTTY, Tunnels and Keys
Michael W Lucas
Effective DevOps
Jennifer Davis & Ryn Daniels
Linux iptables Pocket Reference
Gregor N. Purdy
sed & awk
Dale Dougherty & Arnold Robbins