1.Loaded plugins: fastestmirror, langpacks
Existing lock /var/run/yum.pid: another copy is running as pid 3965.
Another app is currently holding the yum lock; waiting for it to exit...
解決方案：
直接輸入 rm -f /var/run/yum.pid
或者： /etc/init.d/yum-updatesd stop
也可以等更新完了再進行安裝
