A while ago I created a self-signed certificate with this guide (only Steps 1 and 2).
I would like to sign this certificate (a .cer file) with letsencrypt so it is accepted globally. How can I do this? I searched a lot and only found methods to create a new certificate with existing keys. But can I sign my existing certificate with letsencrypt?
The operating system my web server runs on is (include version):
Ubuntu 18.04.01 LTS
I can login to a root shell on my machine (yes or no, or I don’t know):
I’m using a control panel to manage my site (no, or provide the name and version of the control panel):
The version of my client is (e.g. output of
certbot --version or
certbot-auto --version if you’re using Certbot): 0.31.0