Hi, We have changed our mirror domain from "centos.ustc.edu.cn" to "mirrors.ustc.edu.cn", and CentOS mirror is under "http(s)://mirrors.ustc.edu.cn/centos/" Now it supports HTTP, HTTPS and Rsync (rsync://rsync.mirrors.ustc.edu.cn/repo/centos/). The DNS records of centos.ustc.edu.cn will be removed soon. Thank you. -- Linux User Group University of Science and Technology of China Homepage: http://lug.ustc.edu.cn/ E-Mail: lug at ustc.edu.cn Keyu Tao (陶柯宇) <taoky at ustclug.org>