linux 刷新环境变量

要刷新Linux环境变量，有两种方法可以实现。

方法一：在/etc/profile文件中添加变量
通过编辑/etc/profile文件并添加相应的环境变量，可以使该变量对Linux下所有用户都有效，并且是“永久的”修改。可以使用VI编辑器打开/etc/profile文件，添加你需要的环境变量。然后，为了使修改立即生效，需要执行以下命令：source /etc/profile。这将重新加载/etc/profile文件并更新环境变量。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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