Install

sudo apt install certbot python3-certbot-nginx

Create a ssl

First set DNS to server for example.com

certbot --nginx -d example.com

Renew

crontab -e

0 */6 * * * sudo /usr/bin/certbot -q renew

Add domain to exists certificate

certbot certonly --nginx --cert-name hipingu.com -d hipingu.com,www.hipingu.com

Add wildcard

certbot certonly --manual --cert-name allsubdomain -d *.hipingu.com

Cert with TXT

certbot -d example.com --manual --preferred-challenges dns certonly