# drush dl drush --destination="/usr/local/share"
There is no *recommended* release for project drush on Drupal 6.x. Ask the maintainer to review[ok]
http://drupal.org/node/197584 and create/recommend a release in order to be compatible with
drush and the drupal.org security broadcast system. A recommended development snapshot release
is sufficient. Alternatively, run pm-releases command and explicity pm-download any
non-recommended release that might be available.