[CentOS] How do I remove a kernel

Robert Moskowitz wrote:
> I have 4 kernels in /boot, leaving on 20MB which is not enough for the
> next one.
>
> I had installonly_limit= set at 5, as there were some kernel problems. 
> After I got the error that there was not enough room for another kernel,
> I set installonly_limit= to 3 and did the update with --exclude=kernel*
>
> That worked to update everything else, but not remove the oldest kernel.
>
> How can I remove the oldest kernel to make room for the new one?

yum remove kernel-rest-of-kernel-name, for example
yum remove kernel-3.10.0-862.2.3.el7.x86_64

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