先安装依赖包yum-plugin-downloadonly
[root@node1 ~]# yum install yum-plugin-downloadonly
方法一：
[root@node1 ~]# yum install --downloadonly nano
[root@node1 ~]# ll /var/cache/yum/x86_64/7/base/packages
-rw-r--r-- 1 root root 450136 Jul 4 2014 nano-2.3.1-10.el7.x86_64.rpm
不加--downloaddir参数，下载的依赖包会放在默认路径/var/cache/yum/x86_64/7/base/packages下。
方法二：
[root@node1 ~]# yum install --downloadonly --downloaddir=/root keepalived
[root@node1 ~]# ll
-rw-------. 1 root root 1259 Jul 7 18:43 anaconda-ks.cfg
-rw-r--r-- 1 root root 339344 Aug 23 2019 keepalived-1.3.5-16.el7.x86_64.rpm
-rw-r--r-- 1 root root 42784 Aug 23 2019 lm_sensors-libs-3.4.0-8.20160601gitf9185e5.el7.x86_64.rpm
-rw-r--r-- 1 root root 724340 Jun 24 01:36 net-snmp-agent-libs-5.7.2-48.el7_8.1.x86_64.rpm
-rw-r--r-- 1 root root 769104 Jun 24 01:36 net-snmp-libs-5.7.2-48.el7_8.1.x86_64.rpm
参考链接：
https://blog.csdn.net/leo__1990/article/details/90287941