今天使用软件包更新工具的时候连进度都看不到，我就强制退出了它
然后运行
＃yumex
不行，竟然也是出错的信息，NND，我的yum出问题了？
再运行：
＃yum update
出现了：
Loading "fastestmirror" plugin
Existing lock /var/run/yum.pid: another copy is running as pid 5573.
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...
NND，说我正在使用yum。
这时候就只能强制杀掉以前的yum进程了，这个是网上说的方法
＃rm -f /var/run/yum.pid
可是我这样试过了，还是不行啊。
突然在配置yum源里面想起来了一个，就是配置完了yum源后要重启yum源啊
于是我：
＃ /sbin/service yum-updatesd restart
停止 yum-updatesd：[确定]
启动 yum-updatesd：[确定]
结果，好使了。
因此得出结论：先杀了它，再重启yum源是好使滴。
