The default method of changing a Drupal theme using the graphical Admin interface is familiar to most Drupal users. However a Drupal user is limited to changing only one theme at a time using this method and it is also slightly time consuming. What if you want to enable more then one theme at a time? Drupal provides a quicker way to change the theme using the bash command line. Read on to know how to enable multiple Drupal themes using the bash command line