Install drush 10

Install via composer

composer global require drush/drush:10.x

To add Drush to your path, type the following command:

Example for the composer bin located on ~.config/composer/vendor/bin
echo 'export PATH="$HOME/.config/composer/vendor/bin:$PATH"' >> ~/.bashrc
source ~/.bashrc

Example for the composer bin located on ~.composer/vendor/bin
echo 'export PATH="$HOME/.composer/vendor/bin:$PATH"' >> ~/.bashrc
source ~/.bashrc

Check version

drush version

Update drush

composer global update drush/drush