title: NPM : how to source ./node_modules/.bin folder?
body: <p>I have a problem on npm installation</p>
  
  <p>I have created a project say project A</p>
  
  <pre><code>cd ~/projectA
  npm install sails
  </code></pre>
  
  <p>but sails command is not found after installation.</p>
  
  <p>I know that it is successfully install in <code>~/projectA/node_modules</code> directory.
  but the executable cannot be sourced. And i know it is installed <code>~/projectA/node_modules/.bin</code></p>
  
  <p>How can I source the .bin automatically whenever I enter into this projectA folder?</p>
  
  <p>Did I did something wrong?</p>