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!!! note

Drush 9 only supports one install method. It requires that your Drupal 8 site be built with Composer and Drush be listed as a dependency. 

See the [Drush 8 docs](http://docs.drush.org/en/8.x) for installing prior versions of Drush.

Install a site-local Drush and Drush Launcher.

  1. It is recommended that Drupal 8 sites be built using Composer, with Drush listed as a dependency. That project already includes Drush in its composer.json. If your Composer project doesn't yet depend on Drush, run composer require drush/drush to add it.
  2. To be able to call drush from anywhere, install the Drush Launcher. That is a small program which listens on your $PATH and hands control to a site-local Drush that is in the /vendor directory of your Composer project. If you skip this step, run Drush from Drupal root via ../vendor/bin/drush. In that case Drush's bash integration and custom prompt won't work.
  3. Run drush init. This edits ~/.bashrc so that Drush's custom prompt and bash integration are active.
  4. See Usage for details on using Drush.
  5. To use a non-default PHP, edit ~/.bashrc so that the desired PHP is in front of your $PATH. If that is not desirable, you can change your PATH for just one request: PATH=/path/to/php:$PATH drush status ...`

!!! note

Drush 9 cannot run commandfiles from Drush 8 and below (e.g. example.drush.inc). See our [guide on porting commandfiles](https://weitzman.github.io/blog/port-to-drush9). Also note that alias and config files use a new .yml format in Drush 9.

Drupal Compatibility

Drush Version Drush Branch PHP Compatible Drupal versions Code Status
Drush 9 master 5.6+ D8.4+
Drush 8 8.x 5.4.5+ D6, D7, D8.3-
Drush 7 7.x 5.3.0+ D6, D7 Unsupported
Drush 6 6.x 5.3.0+ D6, D7 Unsupported
Drush 5 5.x 5.2.0+ D6, D7 Unsupported