curl -sS https://getcomposer.org/installer | sudo php -- --install-dir=/usr/local/bin --filename=composer
Use it: composer self-update / php /usr/local/bin/composer
curl -sS https://getcomposer.org/installer | sudo php -- --install-dir=/usr/local/bin --filename=composer
Use it: composer self-update / php /usr/local/bin/composer