Got fixed after setting path for composer vendors.So the correct step which worked is,
Download laravel installer: composer global require "laravel/installer=~1.1"
Setup PATH: export PATH="~/.composer/vendor/bin:$PATH"
Then run command : laravel new project-name
or sudo laravel new project-name
For mac,
echo 'export PATH="$HOME/.composer/vendor/bin:$PATH"' > ~/.bashrc
source ~/.bashrc
Ubuntu 16.04 with latest laravel installer
Install composer if not exists,
php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
php -r "if (hash_file('SHA384', 'composer-setup.php') === '55d6ead61b29c7bdee5cccfb50076874187bd9f21f65d8991d46ec5cc90518f447387fb9f76ebae1fbbacf329e583e30') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
php composer-setup.php
php -r "unlink('composer-setup.php');"
sudo mv composer.phar /usr/local/bin/composer
Install laravel installer,
composer global require "laravel/installer"
Edit environment config,
nano .bashrc
Then add,
export PATH="$PATH:$HOME/.config/composer/vendor/bin"
Then reload path config,
source ~/.bashrc
Ubuntu 17.04 and 17.10:
export PATH="~/.config/composer/vendor/bin:$PATH"
Ubuntu 18.04
export PATH="$HOME/.composer/vendor/bin:$PATH"