SED替代背部引用不工作 [英] Sed substitution with back reference not working

问题描述

我收到的输出从一个程序作为制表符分隔值，其中我试图获得第二只使用SED。我目前使用的：

I receive output from a program as tab separated values, of which I am trying to obtain the second only using sed. I am currently using this:

sed -r -e "s/(^[^\t]+\t)([^\t]+\t)(.*$)/\2/"

然而，它似乎并没有找到匹配。我在尝试过 rubular 是它确实给我我想要的比赛。

However it does not seem to find matches. I have tried it in rubular were it does give me the match I want.

推荐答案

有是选择从文本文件称为切列一个专门的工具：

There is a specialized tool for selecting columns from text files called cut:

cut -f2 file

下面我们指示它仅选择第二列，请参阅手册页了解更多信息。 Tab是默认列分隔符。

Here we instruct it to select only the second column, see the manpage for more information. Tab is the default column separator.

这篇关于SED替代背部引用不工作的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！