title: How to install a plugin in Jenkins manually
body: <p>Installing a plugin from the Update center results in:</p>
  
  <blockquote>
    <p>Checking internet connectivity Failed to connect to
    <a href="http://www.google.com/" rel="noreferrer">http://www.google.com/</a>. Perhaps you need to configure HTTP proxy? Deploy Plugin  Failure - Details hudson.util.IOException2: Failed to download from
    <a href="http://updates.jenkins-ci.org/download/plugins/deploy/1.9/deploy.hpi" rel="noreferrer">http://updates.jenkins-ci.org/download/plugins/deploy/1.9/deploy.hpi</a></p>
  </blockquote>
  
  <p>Is it possible to download the plugin and install it manually into Jenkins?</p>