composer require drush/drush:8
composer require drush/drush
drush launcher:
wget -O drush.phar https://github.com/drush-ops/drush-launcher/releases/download/0.6.0/drush.phar wget -O drush.phar https://github.com/drush-ops/drush-launcher/releases/download/0.7.3/drush.phar chmod +x drush.phar sudo mv drush.phar /usr/local/bin/drush
https://docs.drush.org/en/master/install/ + https://github.com/drush-ops/drush-launcher