Quick script to generate a self signed certificate. See https://en.wikipedia.org/wiki/Certificate_signing_request for details of the CSR parameters.

create_ssl_cert.sh

#!/bin/bash
if [ $#  -eq 0 ]; then
  echo "Usage: $0 <CERT_NAME>"
  echo "e.g. $0 example.com"
else
  openssl genrsa -des3 -passout pass:x -out $1.pass.key 2048
  openssl rsa -passin pass:x -in $1.pass.key -out $1.key
  rm $1.pass.key
  openssl req -new -key $1.key -out $1.csr
fi