yum提示Another app is currently holding the yum lock

使用yum安装计划任务功能，结果提示：

yum -y install wget
Loaded plugins: fastestmirror, refresh-packagekit, security
Existing lock /var/run/yum.pid: another copy is running as pid 25960.
Another app is currently holding the yum lock; waiting for it to exit...
多是系统自动升级正在运行，yum在锁定状态中。
已经有一个yum进程在运行了，使用kill杀死它

kill -9 25960
kill对付不了它：

能够经过强制关掉yum进程：

#rm -f /var/run/yum.pid
而后就可使用yum了。