To manually delete an SSL certificate you need to login as root and then run these commands.

grep -irn '' /etc/letsencrypt/
find /etc/letsencrypt/ | grep -i

Then you need to delete the directories and one-two conf files.

Before the deletion inspect the output carefully to make sure you're not deleting the data that belongs to anther domain.

As a safety measure you could move the directories & files into root's home directory directory.




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