php - 全局composer安装Laravel5碰到的问题

系统centos6
根据官方文档执行以下安装命令

composer global require "laravel/installer=~1.1"

执行结果一切顺利

Changed current directory to /home/vagrant/.composer
./composer.json has been created
Loading composer repositories with package information
Updating dependencies (including require-dev)
  - Installing symfony/process (v2.7.3)
    Downloading: 100%

  - Installing symfony/console (v2.7.3)
    Downloading: 100%

  - Installing react/promise (v2.2.1)
    Downloading: 100%

  - Installing guzzlehttp/streams (3.0.0)
    Downloading: 100%

  - Installing guzzlehttp/ringphp (1.1.0)
    Downloading: 100%

  - Installing guzzlehttp/guzzle (5.3.0)
    Downloading: 100%

  - Installing laravel/installer (v1.2.1)
    Downloading: 100%

symfony/console suggests installing symfony/event-dispatcher ()
symfony/console suggests installing psr/log (For using the console logger)
Writing lock file
Generating autoload files

发现~/.composer/vendor/bin目录下没有生成laravel

也就无法执行laravel new blog之类的命令了

请问有人碰到过么，如何解决？