Certbot

Ubuntu:

• Binaries: cerbot and letscrypt
• Renewals: /etc/cron.d/certbot

certonly --standalone

certbot --nginx
Saving debug log to /var/log/letsencrypt/letsencrypt.log
The requested nginx plugin does not appear to be installed

certbot certificates
Saving debug log to /var/log/letsencrypt/letsencrypt.log

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No certs found.
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certbot renew
Saving debug log to /var/log/letsencrypt/letsencrypt.log

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No renewals were attempted.
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• Changing a Certificdate's Domain: certbot certonly --cert-name example.com -d example.org,www.example.org
• Automated renewals: systemctl list-timers

See also

• HTTP, HTTP client, HTTP/1.1, HTTP/2, HTTP/3, HTTPS, HSTS CSR, TLS, SSL, openSSL, WebSockets, WebRTC, ssl_certificate QUIC, HPKP, CT, List of HTTP status codes, URL redirection, Content-type:, Webhook, HTTP headers, --insecure, Axios HTTP client, HTTP cookies, HTTP ETag, Hypertext Transfer Protocol -- HTTP/1.1

https://certbot.eff.org/docs/using.html#changing-a-certificate-s-domains