国内推荐中科大和163源。 首先备份CentOS-Base.repo [root@richard yum.repos.d]# mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup 其次，下载对应版本的CentOS-Base.repo, 放入/etc/yum.repos.d/目录 CentOS6.x [root@richard yum.repos.d]# wget http:：//lug.ustc.edu.cn/wiki/_export/code/mirrors/help/centos?codeblock=2 运行yum clean all、yum makecache生成缓存,OK. | 
