CentOS7更换yum源
下载阿里云的 YUM 源配置文件到 /etc/yum.repos.d/ 目录中
sudo curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
清理 YUM 缓存并生成新缓存
sudo yum clean all
sudo yum makecache
验证是否成功更换 YUM 源
yum repolist
sudo curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
sudo yum clean all
sudo yum makecache
yum repolist