sudo apt-get update -y \
  && sudo apt-get install software-properties-common -y \
  && sudo add-apt-repository universe -y \
  && sudo add-apt-repository ppa:certbot/certbot -y \
  && sudo apt-get update -y \
  && sudo apt-get install certbot python-certbot-nginx -y

Certbot - Ubuntubionic Nginx