centos7 怎麽更換鏡像源

首先備份/etc/yum.repos.d/CentOS-Base.repo

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

2.下載對應版本repo文件, 放入/etc/yum.repos.d/(操作前請做好相應備份)

Centos7:

wget -P /etc/yum.repos.d?/.help/CentOS7-Base-163.repo

Centos6:

wget -P /etc/yum.repos.d?/.help/CentOS6-Base-163.repo

Centos5:

wget -P /etc/yum.repos.d?/.help/CentOS5-Base-163.repo

3.運行以下命令生成緩存

yum clean all

yum makecache