another app is currently holding the yum lock;waiting for it to exit解决

有时用yum升级一些文件时，会出现以下情况：

another app is currently holding the yum lock;waiting for it to exit...

 

可以通过强制关掉yum进程：

#rm -f /var/run/yum.pid

 

然后就可以使用yum了。