[root@localhost wangcheng]# yum install yumex Existing lock /var/run/yum.pid: another copy is running as pid 3807. Another app is currently holding the yum lock; waiting for it to exit... Another app is currently holding the yum lock; waiting for it to exit... Another app is currently holding the yum lock; waiting for it to exit... Another app is currently holding the yum lock; waiting for it to exit... Another app is currently holding the yum lock; waiting for it to exit... Another app is currently holding the yum lock; waiting for it to exit... Another app is currently holding the yum lock; waiting for it to exit... Another app is currently holding the yum lock; waiting for it to exit... Another app is currently holding the yum lock; waiting for it to exit... Another app is currently holding the yum lock; waiting for it to exit...