
MIT teaches operating systems by giving students a complete Unix like kernel and asking them to modify it it is called xv6 and is about 6000 lines of C a reimplementation inspired by Unix Version 6 from 1975 rewritten in modern C for x86 multiprocessor processes system calls virtual memory and filesystem are all there and small enough to read end to end in a weekend this is what you study to understand how operating systems actually work not just how they are described




























