如何在 Linux 中 grep '---'?grep:无法识别的选项“---" [英] How to grep '---' in Linux? grep: unrecognized option '---'

问题描述

我有一个新安装的网络应用程序.其中有一个下拉菜单，其中一个选项是 ---.我想要做的是将其更改为 All.所以我导航到应用程序文件夹并尝试了以下命令.

I have a newly installed web application. In that there is a drop down where one option is ---. What I want to do is change that to All. So I navigated to application folder and tried the below command.

grep -ir '---' .

我最终得到以下错误.

grep: unrecognized option '---'
Usage: grep [OPTION]... PATTERN [FILE]...
Try `grep --help' for more information.

鉴于我正在使用

Distributor ID: Ubuntu
Description:    Ubuntu 10.04.4 LTS
Release:    10.04
Codename:   lucid

如何在 Linux 中 grep '---' ?

How to grep '---' in Linux ?

推荐答案

发生这种情况是因为 grep 将 --- 解释为一个选项而不是要查找的文本.相反，使用 --:

This happens because grep interprets --- as an option instead of a text to look for. Instead, use --:

grep -- "---" your_file

通过这种方式，您可以告诉 grep 其余的不是命令行选项.

This way, you tell grep that the rest is not a command line option.

其他选项:

• 使用 grep -e(参见我添加的 Kent 的解决方案)当他已经发布了 - 直到现在才注意到):

• use grep -e (see Kent's solution, as I added it when he had already posted it - didn't notice it until now):

使用 awk(参见 anubhava 的解决方案)或 sed:

use awk (see anubhava's solution) or sed:

sed -n '/---/p' file

-n 阻止 sed 打印行(其默认操作).然后 /--- 匹配那些包含 --- 的行，并且 /p 使它们被打印出来.

-n prevents sed from printing the lines (its default action). Then /--- matches those lines containing --- and /p makes them be printed.

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