How to search for occurrence of two strings using AND in a line

Asked Jun 08 '18 at 10:50

Active Jun 08 '18 at 10:50

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I want to search for the occurrence of multiple strings in each line and print the lines which have the two strings occurred. Find occurrence of a single string is trivial using grep. However, if I want to test the ocurrence of AB+CD and nonCD at the SAME LINE without considering their order (because using AB+CD.*nonCD will always assume the AB+CD occurrence before nonCD which is unsuitable for my case. This is a sample of the file content:

google.com,9,AB+CD,nonAB+nonCD
youtube.com,9,AB+CD,AB+CD
facebook.com,20,nonCD

If I try: grep -E 'AB+CD|nonCD' file1.txt it prints:

google.com,9,AB+CD,nonAB+nonCD
facebook.com,20,nonCD

What I want is the occurrence of AB+CD AND nonCD in the same line togather without considering their order nor how many times they occurred.

asked Jun 08 '18 at 10:50

user9371654

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Also, `grep -P '^(?=.*AB+CD)(?=.*nonCD)' file1.txt` – Wiktor Stribiżew Jun 08 '18 at 10:55
Using ERE `grep -E 'AB\+CD.*nonCD file` – Inian Jun 08 '18 at 10:56
@WiktorStribiżew: I guess the `+` needs to be escaped, ain't it? – Inian Jun 08 '18 at 10:58
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@Inian If the `+` is a literal `+` and not a quantifier, yes, it should be escaped in a PCRE pattern. – Wiktor Stribiżew Jun 08 '18 at 11:00
@Inian I am not getting what you mean by `\`. The `+` is part of the string. Not mathematical plus. My string is `AB+CD`. In this case, shall I use `\+` – user9371654 Jun 09 '18 at 10:36
@Inian when I use `AB\+CD` it does not find the string `AB+CD`. When I remove `\`. So `\` is not required if I want the string eaxactly `AB+CD` (not arithmatic plus). – user9371654 Jun 09 '18 at 10:46

How to search for occurrence of two strings using AND in a line

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