Self-signed SSL certificate

Following will output example.com.key and example.com.crt files. RSA key length is 8192 bits (rsa:8192), expiration set to ~100 years (-days 36500) and a sha256 fingerprint (-sha256).

(cn="example.com" ; openssl req -new -newkey rsa:8192 -sha256 -days 36500 -nodes -x509 -keyout "${cn}.key" -out "${cn}.crt" -subj "/CN=${cn}")