微软刚刚开源了PowerShell，目前在Linux和MacOS上都能安装。具体的链接如下：
https://github.com/PowerShell/PowerShell
本文将介绍如何在CentOS 7.2下安装PowerShell。
首先在CentOS下下载PowerShell的安装包：
wget https://github.com/PowerShell/PowerShell/releases/download/v6.0.0-alpha.9/powershell-6.0.0_alpha.9-1.el7.centos.x86_64.rpm
或者：
wget https://hweast.blob.core.chinacloudapi.cn/soft/powershell-6.0.0_alpha.9-1.el7.centos.x86_64.rpm
安装时报错：
rpm -ivh powershell-6.0.0_alpha.-.el7.centos.x86_64.rpm
warning: powershell-6.0.0_alpha.-.el7.centos.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID be1229cf: NOKEY
error: Failed dependencies:
libunwind is needed by powershell-6.0.0_alpha.-.x86_64
libicu is needed by powershell-6.0.0_alpha.-.x86_64
需要通过yum安装两个依赖包：
yum install -y libunwind libicu
安装完成后，再次运行rpm安装成功。
rpm -ivh powershell-6.0.0_alpha.-.el7.centos.x86_64.rpm
warning: powershell-6.0.0_alpha.-.el7.centos.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID be1229cf: NOKEY
Preparing... ################################# [%]
Updating / installing...
:powershell-6.0.0_alpha.- ################################# [%]
成功后，可以运行powershell启动powershell环境：
[root@hwslbvm02 ~]# powershell
PowerShell
Copyright (C) Microsoft Corporation. All rights reserved.
PS /root> get-module
ModuleType Version Name ExportedCommands
---------- ------- ---- ----------------
Manifest 3.1.0.0 Microsoft.PowerShell.Utility {Add-Member, Add-Type, Clear-Variable, Compare-Object...}
Script 1.2 PSReadLine {Get-PSReadlineKeyHandler, Get-PSReadlineOption, Remove-PSReadlineKeyHandler, Set-PSReadlineKey...
PS /root> Get-PSRepository
Name InstallationPolicy SourceLocation
---- ------------------ --------------
PSGallery Untrusted https://www.powershellgallery.com/api/v2/