How to Install Drush 8 on Ubuntu 18.04 (LTS)

The quick and dirty installation process

Install composer if you haven’t already.

curl -sS https://getcomposer.org/installer | sudo php -- --install-dir=/usr/local/bin --filename=composer

If you haven’t already, be sure to add composer/vendor/bin to your PATH

This may be different on your system. This however was the path I had to include on my Ubuntu 18.04 (LTS) install.

echo '' >> ~/.bashrc
echo '# Include Composer Installs in PATH' >> ~/.bashrc
echo 'export PATH="$HOME/.config/composer/vendor/bin:$PATH"' >> ~/.bashrc

Install cgr

A safer alternative to composer global require

composer global require consolidation/cgr

Install Drush 8.

cgr drush/drush:8.x-dev --prefer-source

Finally, test!

drush status

You should see your version of drush along with some other data if everything is working.

Notes

Using this method will help resolve the common error: count(): Parameter must be an array or an object that implements Countable Table.php:789