Login as root sudo su Download git clone git@github.com:letsencrypt/letsencrypt.git Setup authentication nginx server { listen 443; ssl_certificate /etc/letsencrypt/live/sub1.site1.com/fullchain.pem; ssl_certificate_key /etc/letsencrypt/live/sub1.site1.com/privkey.pem; ... location /.well-known { alias /tmp/.well-known; } } Create site configs site&