Bash script to install drush into your user folder on Ubuntu

drushinstall.sh

#!/bin/bash

# Install dependencies
function base_install {
  sudo apt-get -y install git-all unzip curl php5-cli php5-gd
}

# Clone Drush and place in user folder
function drush_install {
  cd /tmp && git clone --branch 7.x-5.x http://git.drupal.org/project/drush.git /home/$user/.drush/drush
  if [ ! -f /tmp/drush/drush ]; then
        echo "Could not checkout drush from git"
        exit 1                            
  fi
  return 
}