以下のようになりました。
[root@localhost ~]# yum install yum-plugin-downloadonly Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: ftp.nara.wide.ad.jp * extras: ftp.nara.wide.ad.jp * updates: ftp.nara.wide.ad.jp Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package yum-plugin-downloadonly.noarch 0:1.1.30-14.el6 will be installed --> Finished Dependency Resolution Dependencies Resolved ======================================================================================================================== Package Arch Version Repository Size ======================================================================================================================== Installing: yum-plugin-downloadonly noarch 1.1.30-14.el6 base 20 k Transaction Summary ======================================================================================================================== Install 1 Package(s) Total download size: 20 k Installed size: 21 k Is this ok [y/N]: y Downloading Packages: yum-plugin-downloadonly-1.1.30-14.el6.noarch.rpm | 20 kB 00:00 Running rpm_check_debug Running Transaction Test Transaction Test Succeeded Running Transaction Installing : yum-plugin-downloadonly-1.1.30-14.el6.noarch 1/1 Verifying : yum-plugin-downloadonly-1.1.30-14.el6.noarch 1/1 Installed: yum-plugin-downloadonly.noarch 0:1.1.30-14.el6 Complete! [root@localhost ~]#