从OS级别配置中删除环境变量的命令行 [英] Command line to remove an environment variable from the OS level configuration

问题描述

Windows有 setx 命令

Windows has setx command

Description:
    Creates or modifies environment variables in the user or system
    environment.

所以你可以设置一个这样的变量

So you can set a variable like this

setx FOOBAR 1

，您可以清除像这个

setx FOOBAR ""

但是，该变量不会被删除，它保留在注册表中

However, the variable does not get removed, it stays in the registry

那么你如何实际删除变量？

So how would you actually remove the variable?

推荐答案

当前环境（永久不）

To remove the variable from the current environment (not permanently):

set FOOBAR=

要永久删除用户环境中的变量（这是默认位置 setx put it）：

To permanently remove the variable from the user environment (which is the default place setx puts it):

REG delete HKCU\Environment /F /V FOOBAR

如果变量设置在系统环境中（例如，如果您最初设置为 setx / M ），则以管理员身份运行：

If the variable is set in the system environment (e.g. if you originally set it with setx /M), as an administrator run:

REG delete "HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Environment" /F /V FOOBAR

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