title: My package manager broke when I installed Heroku
body: <pre><code>sudo apt-get install &lt;anything&gt;
  
  Reading package lists... Error!
  E: Encountered a section with no Package: header
  E: Problem with MergeList /var/lib/apt/lists/toolbelt.heroku.com_ubuntu_._en
  E: The package lists or status file could not be parsed or opened.
  </code></pre>
  
  <p>What are my next steps to troubleshoot this?</p>
  
  <hr>
  
  <p>Update:  I tried to reinstall and got the output below.  It seems like it installed, but I get <code>command not found: heroku</code> when I try <code>heroku</code> from the command line.  The install command hung up for a long time on <code>[Waiting for Headers]</code>.</p>
  
  <p>What's my next step based on these error messages?</p>
  
  <pre><code>W: GPG error: http://us.archive.ubuntu.com precise Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key &lt;ftpmaster@ubuntu.com&gt;
  W: GPG error: http://us.archive.ubuntu.com precise-backports Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key &lt;ftpmaster@ubuntu.com&gt;
  W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://extras.ubuntu.com precise Release: The following signatures were invalid: BADSIG 16126D3A3E5C1192 Ubuntu Extras Archive Automatic Signing Key &lt;ftpmaster@ubuntu.com&gt;
  
  W: GPG error: http://dl.google.com stable Release: The following signatures were invalid: BADSIG A040830F7FAC5991 Google, Inc. Linux Package Signing Key &lt;linux-packages-keymaster@google.com&gt;
  W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/precise/Release  
  
  W: Some index files failed to download. They have been ignored, or old ones used instead.
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  heroku-toolbelt is already the newest version.
  </code></pre>