title: git: fatal unable to auto-detect email address
body: <p>I just cannot commit with git on Ubuntu 14.04</p>
  
  <p><strong><em>Error message is:</em></strong></p>
  
  <blockquote>
    <p>git: fatal unable to auto-detect email address (got "some wrong email")</p>
  </blockquote>
  
  <p>I tried <code>git-config</code> with and without the <code>--global</code> option setting
  user.name and user.mail but nothing works</p>