Drush - a utility for quick access to the Drupal core, which is controlled via the command line. Installation is done using Composer.
To install Drush to the root of your hosting account:
mkdir ~/drush && cd ~/drush composer require drush/drush:8.x-dev --prefer-source echo "alias drush='/usr/local/php56/bin/php ~/drush/vendor/bin/drush.php' " >> ~/.bashrc && source ~/.bash_profile
mkdir ~/drush && cd ~/drush composer require drush/drush:9.* echo "alias drush='/usr/local/php56/bin/php ~/drush/vendor/bin/drush' " >> ~/.bashrc && source ~/.bash_profile
This completes the installation of Drush. Now you can run the utility with the command
drush in the terminal. To check the version use the command: