title: MongoDB GPG - Invalid Signatures
body: <p>I'm installing MongoDB on an Ubuntu 14.04 machine, using the instructions at:
  <a href="https://docs.mongodb.org/manual/tutorial/install-mongodb-on-ubuntu/" rel="noreferrer">https://docs.mongodb.org/manual/tutorial/install-mongodb-on-ubuntu/</a></p>
  
  <p>So I run:</p>
  
  <pre><code>sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv EA312927
  </code></pre>
  
  <p>And then:</p>
  
  <pre><code>echo "deb http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/3.2 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.2.list
  </code></pre>
  
  <p>Followed by:</p>
  
  <pre><code>sudo apt-get update
  </code></pre>
  
  <p>I then get the following warning at the end of the update:</p>
  
  <blockquote>
    <p>W: GPG error: <a href="http://repo.mongodb.org" rel="noreferrer">http://repo.mongodb.org</a> trusty/mongodb-org/3.2 Release:
    The following signatures were invalid: BADSIG D68FA50FEA312927 MongoDB
    3.2 Release Signing Key </p>
  </blockquote>
  
  <p>If I ignore the warning and try to run:</p>
  
  <pre><code>sudo apt-get install -y mongodb-org
  </code></pre>
  
  <p>I get:</p>
  
  <blockquote>
    <p>WARNING: The following packages cannot be authenticated!<br>
    mongodb-org-shell mongodb-org-server mongodb-org-mongos
    mongodb-org-tools   mongodb-org E: There are problems and -y was used
    without --force-yes</p>
  </blockquote>
  
  <p>Any ideas on how to resolve? Thanks!</p>