将与模式匹配的行从一个文件移动到另一个文件 [英] Move lines matching a pattern from one file to another

问题描述

我想将符合特定模式的行从 file1 移到 file2 .类似于操作在Windows中将一个文件剪切并粘贴到另一个文件

I want to move lines matching certain pattern from file1 to file2. Analogous to operation cut and paste from one file to another in windows

示例

假设我要从 file1 中删除所有包含bar的行并将其粘贴到新创建的 file2

let's say I want to cut all lines containg bar from file1 and paste it into newly created file2

输入:

file1

bla foo bla
bla bar bla
bla aaa bla
bla bar bla
bla foo bla

处理后所需的输出:

file1

bla foo bla
bla aaa bla
bla foo bla

file2

bla bar bla
bla bar bla

我尝试过的事情

grep创建所需的 file2 ，但不修改 file1

grep creates desired file2 but doesn't modify file1

grep 'bar' file1 > file2

sed -i修改所需的 file1 ，但不创建 file2

sed -i modifies desired file1 but doesn't create file2

sed -i '/bar/d' file1

如果我一个接一个地执行这两个命令，则会得到理想的结果.但是在这里，出于好奇，我正在寻找单行命令，并使脚本更简洁.

If I execute both commands one after another, I get desired result. But here I am looking for a single line command out of curiosity and to make a script more concise.

您的帮助将不胜感激.

推荐答案

这可能对您有用(GNU sed):

This might work for you (GNU sed):

sed -i -e '/bar/{w file2' -e 'd}' file1

替代方法:

sed -i -e '/bar/w file2' -e '//d' file1

要追加到file2，请写入一个临时文件，然后使用bash脚本中的cat追加到文件的末尾，或者使用:

To append to file2, write to a temporary file and use cat to append at the end of file in a bash script, or use:

sed -i -e '/bar/w tmpfile' -e '$e cat tmpfile >> file2 && rm tmpfile' -e '//d' file1

对于最后一种解决方案，一次只能修改一个输入文件.

N.B. For the last solution, only one input file can be modified at a time.

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