[CentOS] update to 7.4

Thanks all for the thoughts. I have no issues with 7.4 - this was clearly
"freek" accident while updating, either internet connection closed on me or
something. I brought the unit back here, I tried a few of the suggestions -
wasn't really working for me. So I just re-installed 7.4 and all was fine.

Thanks again.

Jerry

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Jerry,

I thought I had a freek accident too, but the very same thing happened
to one of mine, actually this machine was my desktop.  For now, I am
booting using an older kernel, but will probably do a fresh install of
7.4 at a latter time. 

Greg