１、为什么计算机的学生要学习Linux开源技术
http://tinylab.org/why-computer-students-learn-linux-open-source-technologies/
2、JOS reading material
https://pdos.csail.mit.edu/6.828/2014/reference.html
3、Writing an OS in Rust
http://os.phil-opp.com/
4、write a boot loader
https://www.codeproject.com/Articles/664165/Writing-a-boot-loader-in-Assembly-and-C-Part
操作系统实例：
５、ucore
https://chyyuu.gitbooks.io/simple_os_book/content/
6、Skelix OS
http://skelix.net/skelixos/tutorial01_zh.html