如何grep在文件中不区分大小写的字符串？ [英] How to grep for case insensitive string in a file?

问题描述

我有一个文件 file1 ，它以
成功... 或
结尾成功...

我希望 grep 单词 success 以一种不区分大小写的方式。

我写了下面的命令，但它是区分大小写

cat file1 | grepsuccess \.\.\。

我如何更改它以使它返回0 与成功... 或
成功...

解决方案

您可以使用 -i 标志，这会使您的模式不区分大小写：

  grep -iFsuccess ...file1 
  

另外，不需要 cat 。 grep 使用语法 grep< pattern> <文件> 。我还使用 -F 标志搜索固定字符串以避免省略省略号。

I have a file file1 which ends with Success... OR success...

I want to grep for the word success in a way which is not case sensitive way.

I have written the following command but it is case sensitive

cat file1 | grep "success\.\.\."

How can i change it so that it returns 0 with both Success... OR success...

解决方案

You can use the -i flag which makes your pattern case insensitive:

grep -iF "success..." file1

Also, there is no need for cat. grep takes a file with the syntax grep <pattern> <file>. I also used the -F flag to search for a fixed string to avoid escaping the ellipsis.

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