drush - Drupal's command line utility

While I have noticed numerous references to Drupal's command-line shell, I never, until tonight, took the time to investigate it.

A good starting point is "A Beginner's Guide To Drush: The Drupal Shell". This gives a quick introduction to several useful commands, including Status, Download (DL) and Enable (EN).

drush.org's site (http://drush.ws/) lists and details all the commands and parameters.

The drush FAQ (https://drupal.org/drush-faq) has lots of installation and setup tips.