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I have found on this answer the regex to find a string between two characters. In my case I want to find every pattern between ‘ and ’. Here's the regex :

(?<=‘)(.*?)(?=’)

Indeed, it works when I try it on https://regex101.com/.

The thing is I want to use it with grep but it doesn't work :

grep -E '(?<=‘)(.*?)(?=’)' file

Is there anything missing ?

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Laurent Mesguen
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1 Answers1

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Those are positive look-ahead and look behind assertions. You need to enable it using PCRE(Perl Compatible Regex) and perhaps its better to get only matching part using -o option in GNU grep: 

grep -oP '(?<=‘)(.*?)(?=’)' file
riteshtch
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