1、

下载composer.phar文件


curl -sS https://getcomposer.org/installer | php


将composer.phar移动到环境变量中并且更名为composer


mv composer.phar /usr/local/bin/composer


使用国内镜像


composer config -g repo.packagist composer https://packagist.phpcomposer.com


2、

1.wget https://dl.laravel-china.org/composer.phar -O /usr/local/bin/composer
chmod a+x /usr/local/bin/composer