如何使用SED在文件的兩個連續行中搜索兩個不同的模式，並在模式匹配后打印下4行？

Question

我正在使用SED並尋找打印圖案匹配的行以及圖案匹配后的下4行。

以下是我的問題的摘要。 “ myfile.txt”內容具有：

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

通過我的命令輸出：

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?";

所需的輸出：

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.;

Answer 1

使用GNU sed：

sed -n '/You/h;{/Two/{x;G;};//,+4p}' myfile.txt

輸出：

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.;  

說明：

• /You/h ：將匹配的行復制到保留空間。 因為只有一個保留空間，所以h將存儲與You匹配的最后一行（即， You won't... ）

• /Two/{x ：當找到Two時， x將模式空間與保留空間交換。 這一點：

  進入模式空間 ： You won't find anything more poisonous;than a harmonious;and friendly group of females.;

  進入容納空間 ： Two state clerks meet in the corridor.;One asks the other,;"Couldn't sleep either?";

• G ：在模式空間上添加新行，並在新行之后復制保留空間
• //,+4p是一個地址范圍，從// （空地址重復最后一個正則表達式匹配，即前2行匹配），直至下4行+4 。 地址范圍用p輸出

Answer 2

也許這對您有幫助；

sed -n -e '/You/h' -e '/Two/{N;N;N;N;x;G;p}' myfile.txt

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.;

Answer 3

這可能對您有用（GNU sed）：

sed -r 'N;/You.*\n.*Two/{:a;$!{N;s/\n/&/4;Ta};p;d};D' file

在模式空間中讀取兩行，進行模式匹配，然后再打印四行（如果可能）。 否則，刪除第一行並重復。