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Set Up Let's Encrypt SSL/TLS for Nginx on Debian 12 and Ubuntu 24.04

Obtain and auto-renew free TLS certificates with Certbot for Nginx on Debian 12 or Ubuntu 24.04. Covers DNS setup, Certbot installation, HTTP-to-HTTPS redirect, TLS hardening, HTTP/2, HSTS, and the OCSP discontinuation.

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