title: vagrant with ubuntu 16.04
body: <p>I have installed vagrant and up a machine with </p>
  
  <pre><code>config.vm.box = "hashicorp/precise64"
  </code></pre>
  
  <p>When I check the linux specs, It was showing ubuntu 12 </p>
  
  <p>I want to install ubuntu 16.04 
  what should I do now ?</p>