title: cannot locate .npmrc file after installing nodejs and npm on ubuntu 12.04
body: <p>I just followed a tutorial to install nodejs and npm on my ubuntu 12.04.
  <a href="https://gist.github.com/dwayne/2983873" rel="noreferrer">https://gist.github.com/dwayne/2983873</a></p>
  
  <p>now after installing both are working fine.
  I checked them by </p>
  
  <p>node -v
  npm -v</p>
  
  <p>They seem to give me desired result.
  My question is I am not able to locate .npmrc file. Is n't it weird.</p>
  
  <p>I want to know is it created by default when we install npm ? or should I create it myself.?</p>