I generated keys and certs for several domains on my local machine with the following
sudo ./letsencrypt-auto certonly --manual
used the “.well-known/acme” directory to validate and loaded the certs for the websites.
So far so good.
Now I have a mail asking for renewal for the first domains.
Is it possible to renew this way too? Or should I just make new certificates and delete the old ones?
To renew a certificate that was generated using the manual plugin, just reuse the command you used to obtain the certificate initially, i.e. sudo ./letsencrypt-auto certonly --manual and use the same inputs. The existing certificate (and key) on disk will be replaced with the new one. Note that you’ll be asked to upload a new challenge file when you run this command.