This small one liner lets you generate an OpenSSL self signed certificate with both a common name and a [Subject Alternative Name (SAN)](https://en.wikipedia.org/wiki/Subject_Alternative_Name). Most guides online require you to specify a separate config file but this guide uses a bash trick [(process substitution)](https://web.archive.org/web/20221014191420/https://superuser.com/questions/1059781/what-exactly-is-in-bash-and-in-zsh) to pass such a config file to OpenSSL via the command line. I...
