Bootstrap's css is not loading I am have a website on drupal and have enabled  Bootstrap theme . 
The problem is http://netdna.bootstrapcdn.com/bootstrap/3.0.2/css/bootstrap.min.css is not loading .
It says "This webpage is not available" when i try to load 

http://netdna.bootstrapcdn.com/bootstrap/3.0.2/css/bootstrap.min.css

in ubuntu ,

But when works fine in windows. 

I have no idea why is this happening .
Plz help.
Add this to your template.php

function MYTHEME_framework_page_build(&amp;$vars) {
    // Add bootstrap cdn.
    drupal_add_css('http://netdna.bootstrapcdn.com/bootstrap/3.0.2/css/bootstrap.min.css ', array('type' =&gt; 'external'));
}

where MYTHEME should be replaced with the name of your theme in your MYTHEME.info.

Save the file on your server 

clear all chaes and reload the page.

now this should be fixred