使用sed，在图案上方或下方插入一行? [英] Using sed, Insert a line above or below the pattern?

问题描述

我需要编辑大量文件，方法是在唯一模式的下方或上方插入一行或多行.请告知如何在外壳中使用sed，awk，perl(或其他任何方式)进行操作.谢谢！示例:

I need to edit a good number of files, by inserting a line or multiple lines either right below a unique pattern or above it. Please advise on how to do that using sed, awk, perl (or anything else) in a shell. Thanks! Example:

some text
lorem ipsum dolor sit amet
more text

我想在lorem ipsum dolor sit amet之后插入consectetur adipiscing elit，所以输出文件将如下所示:

I want to insert consectetur adipiscing elit after lorem ipsum dolor sit amet, so the output file will look like:

some text
lorem ipsum dolor sit amet
consectetur adipiscing elit
more text

推荐答案

在模式后追加:( -i用于就地替换). line1和line2是您要附加(或添加)的行

To append after the pattern: (-i is for in place replace). line1 and line2 are the lines you want to append(or prepend)

sed -i '/pattern/a \
line1 \
line2' inputfile

输出:

#cat inputfile
 pattern
 line1 line2 

要在以下行之前添加行:

To prepend the lines before:

sed -i '/pattern/i \
line1 \
line2' inputfile

输出:

#cat inputfile
 line1 line2 
 pattern

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