https://www.2cto.com/os/201905/807225.html
yum install yum-utils
语法：yumdownloader rpmname --resolve --destdir=/path
CentOS/RHEL 6之前的版本需先下载安装 yum-plugin-downloadonly
yum install yum-plugin-downloadonly
语法： yum install --downloadonly --downloaddir=/path <package-name>
原文：https://www.cnblogs.com/jinanxiaolaohu/p/11043359.html