[ale] Fedora/CentOS - upgrade or clean install?

[Preston]

I am unfamiliar with both Fedora/CentOS (stopped using RH things around
it's 7 series).  Is this a distro that you can change sources and
upgrade or do you always do a clean install?

Initial searching has been a bit... ambiguous.

Preston

-- 
Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
-Dr. Seuss

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