yum update

[Chris Jones]

>
> That is hardly likely to be true. What you install is a disk file, what
> you are running is in memory. Although, that could be a rule that is
> implemented. I just don't know. Does anyone know?

It is a  rule. Yum is configured not to do this.

>
> Although, I will admit for reasons to complicated to explain removing
> the file that represents the running kernel might get the machine in
> trouble under certain circumstances.

It will most likely always get you into trouble. Which is why yum does not do 
it.

Chris