Kernel Hacking

The scope of Linux Kernel hacking is very vast. It involves deep knowledge of UNIX based operating systems and system architecture. It'd help a lot if you have deep knowledge of C programming language. Kernel hacking is usually for the most advanced C programmers and goes much beyond use of pointers. A Linux Kernel hacker is also expected to have advanced understanding of hardware (processors, memory and so on). It's not like a task with steps, but a systematic study of how Kernel works and how it can be manipulated to suit your needs. Don't get carried away with the term 'hacking' as we're talking about ethical hacking here.

I'd recommend you to go through this link: <a href="https://tldp.org/LDP/tlk/tlk.html" target="_blank" rel="noopener noreferrer">The Linux Kernel</a> which is a good start point in understanding Linux Kernel. If you are intending to break into servers (cracking, not hacking) then let me tell you, it takes years of experience to understand how systems work, what flaws they have and then figure out how to break them. It's like learning to play the Guitar, takes years but you never know you're there!

I hope I didn't break your enthusiasm. 😀