掌握命令行，轻松管理你的系统路径：一招教你用CMD查看并调整环境变量

引言

在计算机操作系统中，环境变量是一个非常重要的概念。它用于存储有关系统配置的信息，如路径、系统属性等。正确管理环境变量可以极大地提高工作效率，尤其是在需要频繁访问某些应用程序或脚本时。本文将教你如何使用命令提示符（CMD）来查看和调整环境变量。

什么是环境变量

环境变量是一组包含在操作系统中的变量，它们存储了有关计算机系统的信息。这些变量可以在不同的程序之间传递，并且可以被用来控制程序的行为。在Windows系统中，环境变量通常包括：

• PATH：包含可执行文件的目录列表，当你在命令行中输入一个命令时，系统会在这个列表中查找该命令。
• TEMP：临时文件存放的目录。
• HOME：用户的主目录。
• USERPROFILE：当前用户的主文件夹。

使用CMD查看环境变量

要查看环境变量，你可以使用以下步骤：

1. 打开命令提示符（CMD）。
2. 输入 set 命令并按回车键。

这将显示当前所有环境变量的值。例如：

”`plaintext COMSPEC=C:\Windows\System32\cmd.exe PATH=C:\Windows\System32;C:\Windows;C:\Program Files (x86)\Common Files\Oracle\Java\javapath;C:\Program Files\Java\jdk1.8.0_251\bin;C:\Program Files\Java\jdk1.8.0_251\jre\bin;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\Intel\Intel® Management Engine Components\DAL;C:\Program Files\Intel\Intel® Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel® Management Engine Components\IPT;C:\Program Files\Intel\Intel® Management Engine Components\IPT;C:\Program Files (x86)\Common Files\microsoft shared\Windows Live;C:\Program Files (x86)\Common Files\microsoft shared\Windows Live;C:\Program Files (x86)\Common Files\microsoft shared\Windows Live;C:\Program Files (x86)\Common Files\microsoft shared\Windows Live;C:\Program Files (x86)\Common Files\microsoft shared\Windows Live;C:\Program Files (x86)\Common Files\microsoft shared\Windows Live;C:\Program Files (x86)\Common Files\microsoft 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