How do I write a bash script that uses the 'egrep' command to list files containing...

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Question

How do I write a bash script that uses the 'egrep' command to list files containing...

How do I write a bash script that uses the 'egrep' command to list files containing either 'a' followed by 'g' or 'g' followed by 'a' (possibly with characters in between)?

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Answer 1

Answer #1

egrep - Extended Global Regular Expressions Print

egrep is used for matching a specified pattern. egrep is grep command as 'gerp -e' .

Multiple pattern matching is done with OR condition (|).

* - items will be matched zero or more than one times.

syntax:

egrep ' pattern1|pattern2' file name

Code:

$ egrep ' * (ag|ga)*' *.txt

or

$ egrep '(ag|ga)*' *.txt

Matches with more than one text files.

For specific file:

$ egrep ' * (ag|ga)*' file.txt

or

$ egrep '(ag|ga)*' file.txt

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Answer 2

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