说明：  本书对Linux 早期操作系统内核全部代码文件进行了详细全面的注释和说明，旨在使读者能够在尽量短的时间内对Linux 的工作机理获得全面而深刻的理解，为进一步学习和研究Linux 系统打下坚实的基础。
(Early in this book Linux operating system kernel all the code files for a detailed and comprehensive notes and instructions designed to enable the reader to the shortest possible time, the working mechanism of the Linux access to comprehensive and profound understanding, in order to further study and research to lay a solid foundation for Linux systems.)