UNIX，获取环境变量 [英] UNIX, get environment variable

问题描述

由于一个荒唐的问题，我有一个荒唐的问题.

I have a ridiculous question due to a ridiculous problem.

通常，如果我想在UNIX shell中获取环境变量的内容，则可以

Normally if I want to get the contents of an environment variable in UNIX shell, I can do

echo ${VAR}

由于我可笑的情况，让我们假设这是不可能的.

Let's assume, due to my ridiculous situation, that this isn't possible.

如何在没有人看命令本身(而不是输出)的情况​​下，将环境变量的内容发送到stdout，请参阅环境变量的值.

How do I get the contents of an environment variable to stdout, without someone who is looking at the command itself (not the output), see the value of the environment variable.

我可以将解决方案想象成类似于echo env(NAME_OF_VAR)之类的东西，尽管我似乎找不到它.该解决方案必须在sh中工作.

I can picture the solution being something like echo env(NAME_OF_VAR) although I can't seem to find it. The solution has to work in sh.

PS，我不能为此编写脚本，它必须是内置的unix命令(我知道，这很荒谬)

PS I can't write a script for this, it must be a built in unix command (i know, ridiculous problem)

谢谢(为您的荒谬表示歉意)

Thanks (and sorry for the absurdity)

推荐答案

您可以这样做:

printenv VARIABLE_NAME

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