The Let’s Encrypt management software will:
- Automatically prove to the Let’s Encrypt CA that you control the website
- Obtain a browser-trusted certificate and set it up on your web server
- Keep track of when your certificate is going to expire, and automatically renew it
- Help you revoke the certificate if that ever becomes necessary.
That's all great, but let's assume that I'm running a custom webserver or arcane configuration that the management tool doesn't understand. Will I still be able to get a certificate from Let's Encrypt by going through the motions manually? Without reverse engineering, that is, because otherwise the answer would be 'yes, of course'.