This info in this Drush zone is mostly already covered by links and remarks at the module review page Drush [command line admin and scripting], where you'll also find Drush install instructions and some more 'drush' command line usage examples.
# drush dl drupal-7.16 Project drupal (7.16) downloaded to /Library/WebServer/Documents/drupal-7.16. [success] Project drupal contains: [success] - 3 profiles: testing, standard, minimal - 4 themes: stark, seven, garland, bartik - 47 modules: drupal_system_listing_incompatible_test, drupal_system_listing_compatible_test, user, update, trigger, translation, tracker, toolbar, taxonomy, system, syslog, statistics, simpletest, shortcut, search, rdf, profile, poll, php, path, overlay, openid, node, menu, locale, image, help, forum, filter, file, field_ui, text, options, number, list, field_sql_storage, field, dblog, dashboard, contextual, contact, comment, color, book, blog, block, aggregator
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