CentOS7.1 更新 repo 源 鏡像使用幫助

cd /etc/yum.repos.d/ mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
wget http://mirrors.163.com/.help/CentOS7-Base-163.repo
yum clean all yum makecache