在grep中结合-v标志和-A标志 [英] Combining -v flag and -A flag in grep

问题描述

我需要在文件中搜索字符串，删除包含该字符串的所有行，并且删除包含该字符串的任何行后面的两行。我希望我能用这样的东西来完成这件事......

  $ grep -v -A 2 two temp.txt 
 one 
 five 
 $ 
  

...但不幸的是，不行。有没有一个简单的，我可以用grep或其他shell命令做到这一点？ 下面的代码适用于GNU sed和OS X。

  $ sed'/ two / {N; N; d;}'temp。 txt 
 one 
 five 
  

• 查找行匹配 two


• 多读两行
  
• 删除它们

I need to search a file for a string, remove any line that contains the string, and also remove the two lines following any line that contains the string. I was hoping I could accomplish this using something like this...

$ grep -v -A 2 two temp.txt
one
five
$

...but unfortunately this did not work. Is there a simple I can do this with grep or another shell command?

解决方案

The following works both with GNU sed and with OS X.

$ sed '/two/{N;N;d;}' temp.txt
one
five

• find line matching two
• read in two more lines
• delete them

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