首先安装wget
yum install wget -y
将系统原始配置文件失效
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
使用Wget获取阿里yum源配置文件
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.r
epo
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.r
epo
清空以前yum源的缓存
yum clean all
获取阿里云的缓存
yum makecache