配置阿里云yum源
配置国内yum源的地址
mkdir /etc/yum.repos.d/back mv /etc/yum.repos.d/* /etc/yum.repos.d/back wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo yum clean all yum makecache yum repolist yum update
配置清华大学的yum源
参考
https://blog.csdn.net/xiaojin21cen/article/details/84726193