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: 4018 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: 4018
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