title: Installing head plugin in elastic search with Grails
body: <p>I have Grails project in which I have added elastic search dependencies. 
  Now I want to install <a href="https://github.com/mobz/elasticsearch-head" rel="nofollow">head plugin</a> .</p>
  
  <p>According to documentation of head plugin, command for this is:</p>
  
  <p><code>elasticsearch/bin/plugin -install mobz/elasticsearch-head</code></p>
  
  <p>But I am not able to find bin directory of ES.</p>
  
  <p>So where is the elasticsearch installed in Grails ?</p>