title: Why can't I `sudo apt-get update && sudo apt-get install google-cloud-sdk`?
body: <p>I followed the instructions in this url,
  <a href="https://cloud.google.com/sdk/docs/quickstart-debian-ubuntu" rel="noreferrer">https://cloud.google.com/sdk/docs/quickstart-debian-ubuntu</a>
  and when I typed the command</p>
  
  <pre><code>sudo apt-get update &amp;&amp; sudo apt-get install google-cloud-sdk
  </code></pre>
  
  <p>I got this errors:</p>
  
  <pre><code>E:Malformed line 5 in source list/etc/apt/sources.list.d/google-cloud-sdk.list(dist parse).
  E: The list of sources could not be read.
  </code></pre>
  
  <p>I wrote the above command in virtualenv.
  I cannot understand why this error happens.
  All other step is completed, so I cannot understand why this happens.
  How should I fix this?</p>