Upgrade Drush to Drupal 8 (securing Drupal 6-8 support)
# As we know, Drush 6 (the initial Drush installation on rouge-dev1, 2 and 3) only supports a maximum of Drupal 7. # http://docs.drush.org/en/master/install (there is a table at the bottom of supported versions). # You will need to run the following commands in order: cd ~/.composer vim composer.json # This should list the Drush installation, and the version you are using. Press shift+a to edit this file, and swap the '6' in the version number for '8'. It is important that you set it as 8, not 9. sudo composer global update # This will download your package and overwrite the existing files in place.