First, download the Laravel installer using Composer:

composer global require "laravel/installer"

For mac,

echo 'export PATH="$HOME/.composer/vendor/bin:$PATH"' > ~/.bashrc
source ~/.bashrc

Ubuntu 16.04 with latest laravel installer

Install composer if not exists,

php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
php -r "if (hash_file('SHA384', 'composer-setup.php') === '55d6ead61b29c7bdee5cccfb50076874187bd9f21f65d8991d46ec5cc90518f447387fb9f76ebae1fbbacf329e583e30') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
php composer-setup.php
php -r "unlink('composer-setup.php');"
sudo mv composer.phar /usr/local/bin/composer

Now Run on terminal

laravel