[Centos] Yum update fails with GPG key

> How about in the Main FAQ in the section called Installation :)
> 
> http://www.centos.org/index.php?option=faq&task=viewfaq&artid=24&Itemid=5
> 
> -Johnny Hughes

That wouldn't be bad if the site wasn't a navigation nightmare. I am
usually pretty good at finding stuff, but our site needs help :)

--ras