openssl req -x509 -nodes -days <# of days> -newkey rsa:<keysize> -keyout <key_name>.key -out <cert_name>.crt
Mutterings, inconsistant tips, rants and randomness
openssl req -x509 -nodes -days <# of days> -newkey rsa:<keysize> -keyout <key_name>.key -out <cert_name>.crt