Drupal Bootstrap - 4 - Creating Bootstrap Sub Theme

NOTE: This tutorial is meant for Bootstrap theme 3.0. If you install the newer version 3.1 and above, you can watch the new videos recorded here to see how to create sub theme for 3.1 and above.

Tutorials for Bootstrap Theme 3.1 and above:
https://goo.gl/440JSN

You can then skip few tutorials in this series and proceed to - Tutorial 6 - Getting template files ready.
https://goo.gl/ZtOcKe