UNIX for Advanced & Expert Users

Hello,

I want to know what a kernel is? what are its functions and uses.
what is a unix kernel?

can i make a new kernel like unix or any other OS. if yes what type of programming is needed or can i use C programming language.if there is C, then what kind of C is required (hardware like or...).

if there is any site which has everithing about kernel,s......

cheers

thanks for your very valuable reply......

so i need to learn assembly languages to develope a kernel. is it assembly language in C?

finally.....i want to develope a kernel, what are the required languages to be known.

thanks again for for your reply.

Take a look at some Linux kernel source code.

http://lxr.linux.no/source/