CentOS 7 更新軟件源

[1] 首先備份/etc/yum.repos.d/CentOS-Base.repo

[root@localhost ~]# mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

[2] 進入yum源配置文件所在文件夾

[root@localhost yum.repos.d]# cd /etc/yum.repos.d/

[3] 下載163的yum源配置文件，放入/etc/yum.repos.d/(操作前請做好相應備份)

[root@localhost yum.repos.d]# wget http://mirrors.163.com/.help/CentOS7-Base-163.repo

[4] 運行yum makecache生成緩存

[root@localhost yum.repos.d]# yum clean all

[root@localhost yum.repos.d]# yum makecache