title: Manual install of Elasticsearch plugins
body: <p>Because my Elasticsearch server is behind a proxy, I can't directly install plugins using the command under bin. </p>
  
  <p>So I tried uncompressing some of them in the plugins directory, with no luck.</p>
  
  <p>Specifically I tried this <a href="https://github.com/jprante/elasticsearch-knapsack">https://github.com/jprante/elasticsearch-knapsack</a> and I can't get it to work.</p>
  
  <p>Any help?</p>