How to get your (already generated) .cer file certified by Let's Encrypt


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My domain is:

I ran this command:
I did not run any command. I want to understand how to certify an already generated .cer file.
It produced this output:

My web server is (include version):
I think application runs on Jetty server.
The operating system my web server runs on is (include version):

My hosting provider, if applicable, is:

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):


You don’t, assuming that the .cer file is a certificate already. You generate a new certificate using Certbot or one of the many other clients.


I see. Can you please point me to the best place get the list of commands (instructions to get the certificate?) Thank you very much!!



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