https://www.centos.org/
https://repos.fedorapeople.org/
http://dl.fedoraproject.org/pub/ ---epel扩展库
https://admin.fedoraproject.org/mirrormanager/
http://docs.openstack.org/zh_CN/
常用网址
原文：http://www.cnblogs.com/wall-lq/p/5576275.html
