Linux Composer安装，配置国内镜像

安装 Composer

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

Composer 镜像加速

1、全局配置

composer config -g repo.packagist composer https://packagist.laravel-china.org

2、局部配置(仅限当前工程使用镜像，去掉 -g 便可)

composer config repo.packagist composer https://packagist.laravel-china.org

全局配置信息查看， [repositories.packagist.org.url] 表示当前镜像地址

composer config -gl

取消镜像

composer config -g --unset repos.packagist

查看当前 composer 版本

composer -v

升级 composer 版本

composer selfupdate