subject alternative name

Ubuntu: Creating a self-signed SAN certificate using OpenSSL

There are numerous articles I’ve written  where a certificate is a prerequisite for deploying a piece of infrastructure. This article will guide you through generating a self-signed certificate with SAN (Subject Alternative Name) and SAN wildcard entries, replacing the deprecated usage of CN=<FQDN>. In addition to the operational benefits of managing SAN, it is also Ubuntu: Creating a self-signed SAN certificate using OpenSSL