使用CentOS時，使用yum安裝軟件，老是會遇到這種提示：
Existing lock /var/run/yum.pid: another copy is running as pid 3053.
Another app is currently holding the yum lock; waiting for it to exit...
The other application is: PackageKit
Memory : 37 M RSS ( 82 MB VSZ)
Started: Sun Jan 24 16:11:53 2010 - 14:44 ago
State : Sleeping, pid: 3053
後來才發現只要把/etc/yum/pluginconf.d/refresh-packagekit.conf改為如下：
enabled=0
就OK了。
更多CentOS相關信息見CentOS 專題頁面 http://www.linuxidc.com/topicnews.aspx?tid=14