title: Cannot add OpenJDK 8 repository in Ubuntu 14.04
body: <p>When i'm trying to add the Openjdk 8 repository with this command:</p>
  
  <pre><code>sudo add-apt-repository ppa:openjdk-r/ppa -y
  </code></pre>
  
  <p>I'm getting this error:</p>
  
  <pre><code>Cannot add PPA: 'ppa:openjdk-r/ppa'.
  Please check that the PPA name or format is correct.
  </code></pre>
  
  <p>I have already run these commands:</p>
  
  <pre><code>sudo apt-get install --reinstall ca-certificates
  sudo -E add-apt-repository ppa:openjdk-r/ppa
  </code></pre>