Need help for a Linux term paper?

I have to do a term paper on a OS and i decide to do it on Ubuntu, but i can find any thing that i need on it. I was wonder if you guys know any sites that talks about its, Process Management, File management, Memory Management , I/O system management , and anything else that useful for a term paper. Any help would be good.

All of that stuff is actually handled in the Linux kernel itself, so it is the same for all distributions*. As such, just a general source that discusses the kernel workings in such areas is the place to look, and there are plenty of great resources out there. For example, for a fine overview of scheduling and the various schedulers available, this is a great place to start.

*There are patches and non-committed kernel code that presents newer or improved capabilities that may be added to some kernels that are shipped with the various distros, however as a generalization, they all have the same basic capabilities and underlying structure.