Notes
How to generate domain key and SSL certificate request for Apache HTTP server
$ openssl req -new -newkey rsa:2048 -nodes -sha256 \
-out domain_tld.csr -keyout domain_tld.key \
-subj "/C=US/ST=State/L=City/O=My Corp/OU=IT/CN=domain.tld/emailAddress=admin@domain.tld"