How can I tell what version of Drupal is installed?
Using the Drush command line tool, you can obtain both the major and minor revisions for Drupal.
To display version information, enter the following command on the command line from inside your website's docroot:
The displayed results depend on your installed version of Drupal:
The Drupal user interface also reports the Drupal version. As an administrator, navigate to Reports > Status report (
http://[site_URL]/admin/reports/status). The top row of the table of information contains the Drupal version number.