I was running a yum update and my WAN went down. Now I get this error when trying to run it again. [root@elastix ~]# yum update Loaded plugins: fastestmirror Existing lock /var/run/yum.pid: another copy is running as pid 17490. Another app is currently holding the yum lock; waiting for it to exit... The other application is: yum Memory : 29 M RSS ( 71 MB VSZ) Started: Tue Oct 26 17:42:01 2010 - 07:24 ago State : Sleeping, pid: 17490 I see this: rw-r--r-- 1 root root 5 Oct 26 17:42 yum.pid Can I just delete it? Thanks.