title: Ubuntu : Check that PPA name or format is correct
body: <p>I am using Ubuntu 14.04 and trying to install ethereum blockchain as mentioned in the post below:
  <a href="https://ethereum.gitbooks.io/frontier-guide/content/installing_linux.html" rel="nofollow noreferrer">https://ethereum.gitbooks.io/frontier-guide/content/installing_linux.html</a></p>
  
  <p>While executing command "sudo add-apt-repository -y ppa:ethereum/ethereum", I am getting following exception:</p>
  
  <p>Cannot add PPA: 'ppa/ethereum/ethereum'
  Please Check that PPA name or format is correct.</p>
  
  <p>I researched for this issue and people had suggested following solutions:</p>
  
  <ol>
  <li><a href="https://stackoverflow.com/questions/25822498/please-check-that-the-ppa-name-or-format-is-correct">Please check that the PPA name or format is correct</a></li>
  <li><a href="https://askubuntu.com/questions/429803/cannot-add-ppa-please-check-that-the-ppa-name-or-format-is-correct">https://askubuntu.com/questions/429803/cannot-add-ppa-please-check-that-the-ppa-name-or-format-is-correct</a></li>
  </ol>
  
  <p>I have tried updating the ca-certificates and have also checked my system's date/time.
  Still I am not able to run the ppa command.</p>
  
  <p>Any guidance will be of great help.</p>
  
  <p>Regards
  Anuj</p>