certbot

The Let's Encrypt Agent for automatically obtaining and renewing TLS certificates. Successor to letsencrypt. More information: https://certbot.eff.org/docs/using.html.

• Obtain a new certificate via webroot authorization, but do not install it automatically:
  sudo certbot certonly --webroot --webroot-path {{path/to/webroot}} --domain {{subdomain.example.com}}
• Obtain a new certificate via nginx authorization, installing the new certificate automatically:
  sudo certbot --nginx --domain {{subdomain.example.com}}
• Obtain a new certificate via apache authorization, installing the new certificate automatically:
  sudo certbot --apache --domain {{subdomain.example.com}}
• Renew all Let's Encrypt certificates that expire in 30 days or less (don't forget to restart any servers that use them afterwards):
  sudo certbot renew
• Simulate the obtaining of a new certificate, but don't actually save any new certificates to disk:
  sudo certbot --webroot --webroot-path {{path/to/webroot}} --domain {{subdomain.example.com}} --dry-run
• Obtain an untrusted test certificate instead:
  sudo certbot --webroot --webroot-path {{path/to/webroot}} --domain {{subdomain.example.com}} --test-cert