title: How to change pem file for an ec2-instance without creating new ec2-instance?
body: <p>I have created an instance and its pem file named as <code>demo.pem</code>,<br> But due to some security i have to change my old <code>demo.pem</code> file with <code>demos.pem</code> for the same instance.<br>
  <strong>I do not want to create new instance for changing pem file</strong> => Is it possible? | Help? </p>