宅基地初始没有定义

在按照4.2版的官方安装说明安装homestead时,我在执行时收到以下错误消息$ homestead init:

即

 [Symfony\Component\Console\Exception\CommandNotFoundException]  
  Command "init" is not defined.

我之前的步骤是安装宅基地 composer global require "laravel/homestead=~3.0"

我安装Laravel Homestead version 3.0.1并homestead在我的PATH.