drush 5.10.0-2ubuntu1 (arm64 binary) in ubuntu xenial

 drush is a command line shell and Unix scripting interface for
 Drupal, a veritable Swiss Army knife designed to make life easier for
 Drupal power users who spend a lot of time hacking away at the
 command prompt.
 .
 Drush core ships with lots of useful commands for interacting with code
 like modules/themes/profiles. Similarly, it runs update.php, executes
 sql queries and DB migrations, and misc utilities like run cron or clear
 cache.