我正在使用SED并寻找打印模式匹配的行以及模式匹配后的下4行。
以下是我的问题摘要。 “myfile.txt”内容包含：
As specified in doc.
risk involved in astra.
I am not a schizophrenic;and neither am I.;
Be polite to every idiot you meet.;He could be your boss tomorrow.;
I called the hospital;but the line was dead.;
Yes, I’ve lost to my computer at chess.;But it turned out to be no match for me at kickboxing.;
The urologist is about to leave his office and says:; "Ok, let's piss off now.";
What's the best place to hide a body?;Page two of Google.;
You know you’re old;when your friends start having kids on purpose.;
You won’t find anything more poisonous;than a harmonious;and friendly group of females.;
Two state clerks meet in the corridor.;One asks the other,;"Couldn't sleep either?";
Why do women put on make-up and perfume?;Because they are ugly and they smell.;
Bruce Lee’s all-time favorite drink?;Wataaaaaaaah!;
Daddy what is a transvestite?;-Ask Mommy, he knows.;
That moment when you have eye contact while eating a banana.;
我正在使用以下命令。
sed -n -e '/You/h' -e '/Two/{x;G;p}' myfile.txt
我的命令输出：
You won’t find anything more poisonous;than a harmonious;and friendly group of females.;
Two state clerks meet in the corridor.;One asks the other,;"Couldn't sleep either?";
期望的输出：
You won’t find anything more poisonous;than a harmonious;and friendly group of females.;
Two state clerks meet in the corridor.;One asks the other,;"Couldn't sleep either?";
Why do women put on make-up and perfume?;Because they are ugly and they smell.;
Bruce Lee’s all-time favorite drink?;Wataaaaaaaah!;
Daddy what is a transvestite?;-Ask Mommy, he knows.;
That moment when you have eye contact while eating a banana.;
答案 0 :(得分：3)
使用GNU sed：
sed -n '/You/h;{/Two/{x;G;};//,+4p}' myfile.txt
输出：
You won’t find anything more poisonous;than a harmonious;and friendly group of females.;
Two state clerks meet in the corridor.;One asks the other,;"Couldn't sleep either?";
Why do women put on make-up and perfume?;Because they are ugly and they smell.;
Bruce Lee’s all-time favorite drink?;Wataaaaaaaah!;
Daddy what is a transvestite?;-Ask Mommy, he knows.;
That moment when you have eye contact while eating a banana.;
<强>解释
/You/h：将匹配行复制到保留空间。由于只有一个保留空间，h将存储与You匹配的最后一行（即You won’t...） /Two/{x：找到Two时，x会将模式空间与保留空间进行交换。此时：
进入模式空间：You won’t find anything more poisonous;than a harmonious;and friendly group of females.;
进入保留空间：Two state clerks meet in the corridor.;One asks the other,;"Couldn't sleep either?";
G：在模式空间中添加一个新行并在新行后复制保留空间//,+4p是从//开始的地址范围（空地址重复最后一个正则表达式匹配，即前2行匹配），直到下一个4行+4。地址范围以p 答案 1 :(得分：1)
也许这可以帮到你;
sed -n -e '/You/h' -e '/Two/{N;N;N;N;x;G;p}' myfile.txt
实施例
user@host:/tmp$ sed -n -e '/You/h' -e '/Two/{N;N;N;N;x;G;p}' myfile.txt
You won’t find anything more poisonous;than a harmonious;and friendly group of females.;
Two state clerks meet in the corridor.;One asks the other,;"Couldn't sleep either?";
Why do women put on make-up and perfume?;Because they are ugly and they smell.;
Bruce Lee’s all-time favorite drink?;Wataaaaaaaah!;
Daddy what is a transvestite?;-Ask Mommy, he knows.;
That moment when you have eye contact while eating a banana.;
答案 2 :(得分：1)
这可能适合你（GNU sed）：
sed -r 'N;/You.*\n.*Two/{:a;$!{N;s/\n/&/4;Ta};p;d};D' file
在图案空间中读取两行，模式匹配，然后再打印另外四行（如果可能）。否则，删除第一行并重复。