Install Drush for drupal 8 on Ubuntu GNU/Linux
You are Welcome! The Tutorial shows you Step-by-Step How to Install the Latest Drush Command Line Interface for Drupal 8 on Ubuntu 14.04 Trusty Tahr LTS GNU/Linux Desktop/Server.
Drush is a command line shell and Unix scripting interface for Drupal. If you are unfamiliar with shell scripting, reviewing the documentation for your shell (e.g. man bash) or reading an online tutorial (e.g. search for “bash tutorial”) will help you get the most out of Drush.
Open a Command Line Terminal Window
(Press “Enter” to Execute Commands).
Or Login into the Shell…
How to Install Composer Manager for PHPInstalling Composer for PHP
Installing Drush CLi for Drupal8 on Ubuntu.
composer global require drush/drush:dev-master
Insert Drush into User Path.
echo "export PATH=$PATH:$HOME/.composer/vendor/bin" > $HOME/.bashrc
Testing Drush Installation.
Getting Started with Drush 7 CLI CommandsDrush 7 Commands Quick Start