提示信息：
Another app is currently holding the yum lock; waiting for it to exit...
The other application is: PackageKit
Memory : 27 M RSS ( 74 MB VSZ)
Started: Wed Jun 6 22:59:02 2018 - 03:47 ago
State : Sleeping, pid: 2884解决
rm -f /var/run/yum.pid[yum]Another app is currently holding the yum lock
原文：http://blog.51cto.com/xiaowangzai/2125530