openssl ecparam -list_curves

openssl ecparam -out ec_pk_secp256k1_cert0.pem -name secp256k1 -genkey 
openssl req -new -key ec_pk_secp256k1_cert0.pem -x509 -nodes -days 365 -out ec_secp256k1_cert0.pem

openssl ecparam -out ec_pk_secp384r1_cert0.pem -name secp384r1 -genkey 
openssl req -new -key ec_pk_secp384r1_cert0.pem -x509 -nodes -days 365 -out ec_secp384r1_cert0.pem