yum提示Another app is currently holding the yum lock _holding

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

[[email protected] ~]# yum repolist Another app is currently holding the yum lock; waiting for it to exit... The other application is: PackageKit Memory : 153 M RSS (266 MB VSZ) Started: Thu Jul 12 00:03:05 2012 - 06:17 ago State : Sleeping, pid: 14997 Another app is currently holding the yum lock; waiting for it to exit... The other application is: PackageKit Memory : 153 M RSS (266 MB VSZ) Started: Thu Jul 12 00:03:05 2012 - 06:19 ago State : Sleeping, pid: 14997

可能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干掉它：

# kill -s 9 14997 # ps aux|grep yum root 6744 0.0 0.0 103260 900 pts/1 S+ 14:59 0:00 grep yum root 14997 0.0 0.0 0 0 ? Z Sep19 0:01 [yumBackend.py] < defunct> 1234

很遗憾，kill对付不了它，那怎么办呢？
可以通过强制关掉yum进程：

【yum提示Another app is currently holding the yum lock】解决方法：
rm -rf /var/run/yum.pid 来强行解除锁定，然后你的yum就可以运行了