I have some trouble on finding files and structures in Linux.(Mandrake 10.0).

For example, I have trouble finding the answers to such questions:

1)Find out in which directory and file in the kernel sources, process descriptor block(PCB) (a structure of type struct task) is defined.

2)Find out the file scheduler.c in the source code tree of kernel 2.6. Find out by searching the kernel sources how many different scheduling classes are there in Linux. Find out priority ranges.

3)In kernel sources, find out where the runqueue structure is defined(directory and file name).

I want to be able to do such finding and searching questions by myself. It's better if you know the answers directly, but it's also better that you teach me how to find a file or directory in linux.

Well there are two ways I can think of to go about this.

1) Go to Cross-referencing Linux. You can choose a kernel version and search through the source by a number of different menthods to find what your looking for.

2) Use grep/egrep and find to search through the linux source on your machine.