[root@freenet_aliyun free]# drush pmi transliteration
Command pm-info needs a higher bootstrap level to run - you will need to invoke drush from a more functional  [error]
Drupal environment to run this command.
The drush command 'pmi transliteration' could not be executed.                                                                                      [error]
A Drupal installation directory could not be found                                                                                                                [error]

在阿里云上运行 DRUSH  出的问题，谁能棒我看看？