delete unused certificate on certbot
# Show the list of certificates
certbot certificates
# Remove certificates for a given domain
sudo certbot delete --cert-name $mydomain
create certificate only
certonly --manual --preferred-challenges dns --email email@gmail.com--server https://acme-v02.api.letsencrypt.org/directory --agree-tos -d 'test.ipang.my.id
#source https://m-thirumal.github.io/installation_guide/TLS/let%27s_encrypt/