grep 一个文件，但显示几个周围的行? [英] grep a file, but show several surrounding lines?

问题描述

我想对一个字符串进行grep，但还要显示前五行和后五行以及匹配的行.我如何才能做到这一点?

I would like to grep for a string, but also show the preceding five lines and the following five lines as well as the matched line. How would I be able to do this?

推荐答案

对于 BSD 或 GNU grep 你可以使用 -B num 设置匹配前的行数，-A num 设置匹配后的行数.

For BSD or GNU grep you can use -B num to set how many lines before the match and -A num for the number of lines after the match.

grep -B 3 -A 2 foo README.txt

如果希望前后行数相同，可以使用-C num.

If you want the same number of lines before and after you can use -C num.

grep -C 3 foo README.txt

这将显示前 3 行和后 3 行.

This will show 3 lines before and 3 lines after.

这篇关于grep 一个文件，但显示几个周围的行?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！