drush migrate-status command not found I've installed both version of drush using composer, and trying to list migration within my newer drup8 installation, in order to migrate an older drupal 7 website .. then I feel really stucked because I can't follow the next commands to execute ..

composer global require drush/drush:dev-master --&gt; migrate-status not found
composer global require drush/drush:7.* --&gt; won't work with drupal8


Any ideas or enlightment would be greatly appreciated.
Try drush status and drush help to see if Drush is working with your Drupal 8 site.  Presumably, drush help will confirm that the migrate-status command is not available.  Try enabling the migrate module on your Drupal 8 site.