Drush (Drupal Shell) is a command line tool (cli) for drupal site management. It runs server-side and it is Drupal (6.x/7.x/8.x) version independent (it is not a module). In our cPanel web hosting packages you will find drush ready to use once you have connected with SSH.
Drush command syntax*:
drush [options] <command> [argument1] [argument2]
drush help
drush topic
drush help command
IMPORTANT: the commands should be run inside Drupal's root path or deeper eg: /home/user/public_html or /home/user/public_html/mysite Drupal installation status
drush status
drush dl project_name
drush en project_name
drush en project_name -y
drush cc all
drush up
Of course Drupal is quite famous for its documentation, Drush tool could not be an exemption read more at Drupal page for drush (guides, manual, cheatsheets κλπ) https://www.drupal.org/documentation/modules/drush