How to install DRUSH 8.x for Drupal 7 on a shared or dedicated server

These instructions are to share Drush amongst all sites in a shared server.

There are loads of resources on how to install Drush but it can all get a bit confusing, for example:

https://docs.drush.org/en/8.x/install-alternative/

This documentation is for Drush 8.

http://docs.drush.org/en/8.x/

# Browse to https://github.com/drush-ops/drush/releases and download the drush.phar attached to the latest 8.x release.

At this time of this writing it’s ~~8.2.1~~ 8.4.5

wget https://github.com/drush-ops/drush/releases/download/8.4.5/drush.phar

# Test your install.

php drush.phar core-status

# Rename to `drush` instead of `php drush.phar`. Destination can be anywhere on $PATH.

chmod +x drush.phar
sudo mv drush.phar /usr/local/bin/drush

# Optional. Enrich the bash startup file with completion and aliases.

drush init

References