https://wizardforcel.gitbooks.io/wangdaokaoyan-os/content/19.html
https://www.jianshu.com/p/a5cdcb909d81
https://github.com/taizilongxu/interview_python#unix%E8%BF%9B%E7%A8%8B%E9%97%B4%E9%80%9A%E4%BF%A1%E6%96%B9%E5%BC%8Fipc
sso和oauth了解一下
