title: How to configure postgresql for the first time?
body: <p>I have just installed postgresql and I specified password x during installation. 
  When I try to do <code>createdb</code> and specify any password I get the message:</p>
  
  <blockquote>
    <p>createdb: could not connect to database postgres: FATAL:  password authentication failed for user</p>
  </blockquote>
  
  <p>Same for <code>createuser</code>.</p>
  
  <p>How should I start? 
  Can I add myself as a user to the database?</p>