Another app is currently holding the yum lock

解决yum进程

Existinglock/var/run/yum.pid:anothercopyisrunningaspid2503.
Anotherappiscurrentlyholdingtheyumlock;waitingforittoexit...
Theotherapplicationis:yum
Memory:19MRSS(306MBVSZ)
Started:ThuOct2923:03:022015-04:00ago
State:Traced/Stopped,pid:2503
Anotherappiscurrentlyholdingtheyumlock;waitingforittoexit..

因为你已经有yum命令在进程里执行所以会出行以上错误结局方案就是强行解锁yum进程

rm-rf/var/run/yum.pid然后就可以正常使用你的yum了