在同一命令中组合多个正则表达式 [英] Group more than one regular expression in the same command

问题描述

如何在一个命令中组合两个正则表达式

How to group two regular expression in one command

例如，如果有这样的文件:

example if have a file like:

age22
Helwan University Engineering Faculty
ITI-intake33
bye FOr NOW
i am mahmoud 34
mie 4
a

我想搜索以 by 开头并以 W 结尾的行 ???

And I want to search for the line that start with by and end with W ???

使用grep命令

推荐答案

为此，您不需要多个正则表达式.

You don't need more than one regular expression for this.

grep '^by.*W$' filename.txt

应该够了.

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