sudo git clone https://github.com/drush-ops/drush.git /usr/local/src/drush
cd /usr/local/src/drush
You are on master now, the latest version of drush ... if you prefer another one, check it out:
sudo git checkout 10.2.2
Make it globally available and put it to work:
sudo ln -s /usr/local/src/drush/drush /usr/bin/drush
sudo composer install
Check if it works:
drush --version