certbot

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certbot register a email

certbot register -m [email protected] --work-dir ./ --logs-dir=./logs/

generate a ssl cert with cerbot (let's encrypt)

certonly -d "*.xyz.com" -d "www.xyz.com" --manual

generate a ssl cert with certbot (let's encrypt) with dns challenge

certonly --preferred-challenges dns --manual -d "*.xyz."