DOS 逐渐退出历史舞台后，Windows 一直内置着 CMD 命令行工具，并在 Windows 7 时代升级为更强悍的 PowerShell，不仅可以执行命令行，更可以执行各种高级脚本，还能跨平台。
最近，微软发布了 PowerShell Core 6.2，现在又宣布了全新的下一代 PowerShell 7。
微软表示，PowerShell 的用户量直线飙升，但大多都来自 Linux，Windows 平台上反而没什么成长，这很可能是 PowerShell 5.1 与新版 PowerShell Core 的不兼容性，导致很多用户无法升级。
为此，PowerShell 7 将同时取代旧版的 PowerShell 5.1、PowerShell Core 6.x，并且完全跨平台，Windows、Linux、macOS 上用起来都是一样的，拥有极高的兼容性。
不过尽管名称变化很大，PowerShell 7 并不会做太大幅度的改变，更多地是为了确保非 Windows 平台上的兼容性。
PowerShell 7 会基于.NET Core 3.0，估计能兼容 90％ 以上的 Windows PowerShell 模块。
另外，PowerShell 7 在支持周期方面将提供 LTS (长期服务)、non-LTS (非长期服务)两种版本。
PowerShell 7 的首个预览版预计 5 月份放出，正式发布则要等到 .NET Core 3.0 发布之后，最终会集成在 Windows 系统内，并与 PowerShell 5.1 共存。
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