Linux命令sed多组命令集

以下是处理2到结尾&＃xff0c;使用that替换this&＃xff0c;并且me替换test&＃xff0c;使用分组的时候&＃xff0c;用花括号包起来即可。

[root&＃64;localhost shell]# cat helloworld.txt
this is test
this is test
this is test
this is test
this is test
[root&＃64;localhost shell]# sed &＃39;2,${s/this/that/;s/test/me/}&＃39; helloworld.txt
this is test
that is me
that is me
that is me
that is me

合并两个文件的内容&＃xff0c;如果我们使用cat a.txt >> b.txt&＃xff0c;这种方式是追加写入到文件&＃xff0c;有的时候我们并不需要写文件&＃xff0c;而是要得到两个文件的所有内容&＃xff08;合并之后的&＃xff09;

[root&＃64;localhost shell]# cat a.txt
this is file a
this is file a
[root&＃64;localhost shell]# cat b.txt
this is file b
this is file b
[root&＃64;localhost shell]# sed &＃39;$r a.txt&＃39; b.txt
this is file b
this is file b
this is file a
this is file a