title: Strange npm behavior when installing packages like grunt
body: <p>I run the following command in my <code>bash</code> and I get the related results:</p>
  
  <pre><code>merianos@merianos-desktop:~$ sudo npm install -g grunt-cli
  /usr/local/bin/grunt -&gt; /usr/local/lib/node_modules/grunt-cli/bin/grunt
  grunt-cli@0.1.13 /usr/local/lib/node_modules/grunt-cli
  ├── resolve@0.3.1
  ├── nopt@1.0.10 (abbrev@1.0.7)
  └── findup-sync@0.1.3 (lodash@2.4.2, glob@3.2.11)
  </code></pre>
  
  <p>and</p>
  
  <pre><code>merianos@merianos-desktop:~$ grunt
  /usr/bin/env: node: No such file or directory
  </code></pre>
  
  <p>I also have try to install <code>bower</code> and <code>gulp</code> but again, when I try to execute them, I get a message related to the <code>grunt</code> above.</p>
  
  <p>Can someone please help me ?</p>
  
  <p>Just to know, I just installed <code>Ubuntu 15.04</code>. I don't know if that helps :)</p>