Literature :

Starting Of With OSCP :

https://www.cybrary.it/0p3n/prep-guide-offsecs-pwkoscp/

https://tulpa-security.com/2016/09/19/prep-guide-for-offsecs-pwk/

https://jivoi.github.io/2015/06/19/oscp-prepare/

https://theslickgeek.com/oscp/

http://hackingandsecurity.blogspot.qa/2016/04/oscp-related-notes.html

Lab Machines (Hints) :

https://forums.offensive-security.com/showthread.php?t=3506

https://jivoi.github.io/2015/07/01/pentest-tips-and-tricks/

http://pentestmonkey.net/cheat-sheet/shells/reverse-shell-cheat-sheet

http://www.computersecurity.org/computer-cyber-security-certifications-education-college-courses/cheat-sheet-how-to-pass-the-oscp-offensive-security-certified-professional-exam-step-by-step-guide-sqli-xss-web-app-attacks-part-5/

Zines

2600: The Hacker Quarterly

https://www.2600.com/

Go null yourself

http://web.textfiles.com/ezines/GONULLYOURSELF/gonullyourself1.txt

Hacking with Kali

https://archive.org/stream/HackingWithKali/Hacking with Kali_djvu.txt

Books:

Hacking - The Art of Exploitation

Pentesting - A Hands-On Introduction to Hacking by Georgia Weidman

References for Code :

https://github.com/hfiref0x

Privleage esclation linux:

http://repository.root-me.org/Administration/Unix/EN%20-%20sudo%20:%20you're%20doing%20it%20wrong.pdf

http://repository.root-me.org/Administration/Unix/EN%20-%20SUID%20Privileged%20Programs.pdf

http://repository.root-me.org/Administration/Unix/EN%20-%20Dangers%20of%20SUID%20Shell%20Scripts.pdf