cd ~/Homestead/ && Vagrant up

如果出现这个
$ cd ~/Homestead/ && vagrant up
Bringing machine 'homestead-7' up with 'virtualbox' provider...
The version of powershell currently installed on this host is less than
the required minimum version. Please upgrade the installed version of
powershell to the minimum required version and run the command again.

Installed version: 2

Minimum required version: 3
可以下载更新,下载地址
https://www.microsoft.com/en-us/download/d...
准备安装Windows Management Framework 4.0：
下载适合您的操作系统和体系结构的正确软件包。支持以下体系结构。
Windows 7 SP1
x64：Windows6.1-KB2819745-x64-MultiPkg.msu
x86：Windows6.1-KB2819745-x86.msu
Windows Server 2008 R2 SP1
x64：Windows6.1-KB2819745-x64-MultiPkg.msu
Windows Server 2012
x64：Windows8-RT-KB2799888-x64.msu
关闭所有Windows PowerShell窗口。
卸载Windows Management Framework 4.0的任何其他副本，包括任何预发行副本或其他语言的副本。