Deinstalling previous Grid Infrastructure Home after an upgrade to 18c

(Picture by The Creative Exchange, via Unsplash) Yesterday, I upgraded my lab Grid Infrastructure version 12.1 to version 18c on Oracle Linux Server release 7. Everything went (approximately) OK, but this is not the subject of interest today. Afterwards, I wanted to get rid of the old 12.1 Grid Infrastructure home with the deinstall utility.

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