如何将grep输出重定向到变量? [英] How to redirect grep output to a variable?

问题描述

我有一些烟斗.例如，我有这个管道:

I have some pipe. For example, I have this pipe:

user@user:~$ cal | head -1 | grep -oP "[A-Za-z]+"

对于这个管道，我得到了这个结果:

For this pipe I get this result:

September

我想将此结果存储到一个变量中.我写了以下命令:

I want to store this result to a variable. I write the following commands:

user@user:~$ cal | head -1 | month=$(grep -oP "[A-Za-z]+") | echo $month

我得到了空白字符串.有什么问题?

And I get the blank string. What is the problem?

推荐答案

 month=$(cal | head -1 | grep -oP "[A-Za-z]+")

或

 month=$(date +%B)

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