title: Two key pem for one instance amazon web service
body: <p>I use a key pem ubuntu amazon in one aws instance and I want to add another key pem to access the same instance from another computer, but I want that the two key pems working. Is possible do it, one for me and another to my coworker? Two key pem with one instance?</p>
  
  <p>I want to do it because only my computer have the permission to access the ssh.</p>