https://sushant747.gitbooks.io/total-oscp-guide/content/privilege_escalation_-_linux.html
https://www.offensive-security.com/pre-registration/
https://www.offensive-security.com/pre-registration/
www.offensive-security.com
https://www.udemy.com/course/nmap-for-penetration-testing/
Nmap For Penetration Testing: Beginner To Advanced
Master network mapping, scanning and enumeration with Nmap.
www.udemy.com