title: Error installing openjdk-7-jre on Ubuntu Trusty
body: <p>On install I get this:</p>
  
  
  
  <pre class="lang-none prettyprint-override"><code>Unpacking openjdk-7-jre-headless:amd64 (7u51-2.4.6-1ubuntu4) ...
  </code></pre>
  
  <p>Finally followed by this:</p>
  
  <pre class="lang-none prettyprint-override"><code>Errors were encountered while processing:
   ca-certificates-java
   openjdk-7-jre-headless:amd64
   openjdk-7-jre:amd64
   icedtea-7-jre-jamvm:amd64
  E: Sub-process /usr/bin/dpkg returned an error code (1)
  </code></pre>
  
  <p>I've tried:</p>
  
  <pre class="lang-none prettyprint-override"><code>apt-get autoclean
  apt-get clean
  apt-get update
  apt-get upgrade
  apt-get dist-upgrade
  apt-get -f install
  dpkg --configure -a
  </code></pre>
  
  <p>To no avail. I've purged every package it complains about. I've removed the packages from <code>/var/lib/dpkg/info</code> manually. No idea how to proceed!</p>