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It produced this output:
Hint: The Certificate Authority failed to verify the temporary Apache configuration changes made by Certbot. Ensure that the listed domains point to this Apache server and that it is accessible from the internet.
$ curl -Ii http://www.ingber.com/.well-known/acme-challenge/sometestfile -A "Mozilla/5.0 (compatible; Let's Encrypt validation server; +https://www.letsencrypt.org)"
HTTP/1.1 302 Found
Date: Tue, 04 Feb 2025 19:04:09 GMT
Server: Apache/2.4.58 (Ubuntu)
Location: https://www.ingber.com/.well-known/acme-challenge/sometestfile
Content-Type: text/html; charset=iso-8859-1
And following the redirection
$ curl -k -Ii https://www.ingber.com/.well-known/acme-challenge/sometestfile -A "Mozilla/5.0 (compatible; Let's Encrypt validation server; +https://www.letsencrypt.org)"
HTTP/1.1 404 Not Found
Date: Tue, 04 Feb 2025 19:04:12 GMT
Server: Apache/2.4.58 (Ubuntu)
Content-Type: text/html; charset=iso-8859-1
I would guess the the web server is Apache/2.4.58
and the Operating System is Ubuntu
These 7 domain names are severing this certificate crt.sh | 14322877690, yet from this list of issued certificates crt.sh | ingber.com there are other subdomains with newer issued certificates