title: Installing PostgreSQL 9.4: "gpg: no valid OpenPGP data found"
body: <p>I'm trying to install PostgreSQL 9.4 on a clean, new Debian Jessie machine. </p>
  
  <p>I'm following these instructions: <a href="https://wiki.postgresql.org/wiki/Apt#Quickstart" rel="noreferrer">https://wiki.postgresql.org/wiki/Apt#Quickstart</a></p>
  
  <p>When I get to this point:</p>
  
  <pre><code>wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add -
  </code></pre>
  
  <p>I get this error:</p>
  
  <pre><code>gpg: no valid OpenPGP data found.
  </code></pre>
  
  <p>What am I doing wrong?</p>