The kernel of Linux is responsible for handling all the interactions between CPU and outside world, deciding the order of all programs share the processor time, effectively managing hundreds or thousands of processes to share the limited memory available in system, skillfully planning the data transmission as a whole to save the time consumed by CPU on waiting for the slower hard drive. Therefore, in-depth study of the most essential parts of the Linux kernel lets you completely understand what makes Linux run normally and why it can work well in various system distributions.

Knowing very well about the nature and principle of computer system is crucial for each programmer who wants to study programming in depth. Computer Systems: A Programmer's Perspective (CS: APP for short) is the prestigious authority work in this field, regarded as one of the greatest computer teaching materials by a great number of professionals. Meanwhile, it's also been the preferred textbook for computer system courses in a lot of famous colleges around the world.