将grep用于多种搜索模式 [英] Using grep for multiple search patterns

问题描述

考虑我有以下数据流：

  BODY1 
 attrib1：someval11 
 attrib2： someval12 
 attrib3：someval13 
 
 BODY2 
 attrib1：someval21 
 attrib2：someval22 
 attrib3：someval23 
 
 BODY3 
 attrib1：someval31 
 attrib2：someval32 
 attrib3：someval33 
  

我想为每个BODY提取 only attrib1和attrib3 ，即

  attrib1：someval11 
 attrib3： someval13 
 attrib1：someval21 
 attrib3：someval23 
 attrib1：someval31 
 attrib3：someval33 
  

我试过了

grep'attrib1 \ | attrib3'，根据<一个href =http://www.cyberciti.biz/faq/searching-multiple-words-string-using-grep/ =noreferrer>本网站，但没有任何回报。 grep attrib1 和 grep attrib2 会返回数据，但只针对指定的单个模式。

解决方案 >

从 man 页面：

-e PATTERN ，--regexp = PATTERN

使用PATTERN作为模式。这可用于指定
多个搜索模式，或用于保护以
开头的模式连字符（ - ）。 （-e由POSIX指定）。

编辑：
或者，您可以将模式保存在文件中，并使用 -f 选项：

  aman @ aman-VPCEB14EN：〜$ cat> patt 
 attrib1 
 attrib3 
 
 aman @ aman-VPCEB14EN：〜$ grep -f patt test 
 attrib1：someval11 
 attrib3：someval13 
 attrib1：someval21 
 attrib3：someval23 
 attrib1：someval31 
 attrib3：someval33 
  

Consider I have the following stream of data:

BODY1
attrib1:  someval11
attrib2:  someval12
attrib3:  someval13

BODY2
attrib1:  someval21
attrib2:  someval22
attrib3:  someval23

BODY3
attrib1:  someval31
attrib2:  someval32
attrib3:  someval33

I want to extract only attrib1 and attrib3 for each BODY, i.e.

attrib1:  someval11
attrib3:  someval13
attrib1:  someval21
attrib3:  someval23
attrib1:  someval31
attrib3:  someval33

I tried

grep 'attrib1\|attrib3', according to this site but that returned nothing. grep attrib1 and grep attrib2 do return data but just for the single pattern specified.

解决方案

grep -e 'attrib1' -e 'attrib3' file

From the man page :

-e PATTERN, --regexp=PATTERN
Use PATTERN as the pattern. This can be used to specify multiple search patterns, or to protect a pattern beginning with a hyphen (-). (-e is specified by POSIX.)

Edit : Alternatively , you can save patterns in a file and use the -f option :

aman@aman-VPCEB14EN:~$ cat>patt
attrib1
attrib3

aman@aman-VPCEB14EN:~$ grep -f patt test
attrib1:  someval11
attrib3:  someval13
attrib1:  someval21
attrib3:  someval23
attrib1:  someval31
attrib3:  someval33

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