What is Drush?

It's a command line shell and scripting interface for Drupal. The Drush Package Manager allows you to download, enable, disable, uninstall, update modules/themes/profiles/translations from the command line in a very simple way (apt-get style) - just type,

drush dl views
and
drush pm-enable views
in a Drupal directory to install the Views project! Additionally, the Drush Package Manager also allows you to update all your modules and even Drupal core with just one command,
drush pm-update

How to install Drush

  1. Download the current version of the Drush Package from the Drupal website.
  2. Upload the folder to the root directory of your server. I did this on a shared environment.
  3. Login to your server via shell.
  4. Make the 'drush' command executable:
    $ chmod u+x ~/drush/drush
  5. create an alias to drush:
    $ alias drush='~/drush/drush'
    Now, you must log out and then log back in again or re-load your bash configuration file to apply your changes to your current session:
    $ source .bashrc
  6. Start using drush by running "drush" from your Drupal root directory.