Hi I am looking for a way I can use regex with grep (unix) or textpad (windows) to look information from specific lines.

Currently my application logs lots of information and logs are very huge. I need to look for specific words to locate if that is the particular line I am looking for.

Words are like "NOAM.CORP.COM", "TOTAL" and "LOGIN". If all these three words are present then I need to pick that line.

Please advise a regex here.

Thanks,

Praveen.

There has to be a better way, but from what I understand of grep's regex support:

.*\bNOAM\.CORP\.COM\b.*\bTOTAL\b.*\bLOGIN\b|.*\bTOTAL\b.*\bLOGIN\b.*\bNOAM\.CORP\.COM\b|.*\bLOGIN\b.*\bNOAM\.CORP\.COM\b.*\bTOTAL\b|.*\bTOTAL\b.*\bNOAM\.CORP\.COM\b.*\bLOGIN\b|.*\bNOAM\.CORP\.COM\b.*\bLOGIN\b.*\bTOTAL\b|.*\bLOGIN\b.*\bTOTAL\b.*\bNOAM\.CORP\.COM\b

(pattern edited)

On platforms that support lookahead constructs:

(?=.*\bNOAM\.CORP\.COM)(?=.*\bTOTAL\b)(?=.*\bLOGIN\b).*

or:

(?=.*\bNOAM\.CORP\.COM)(?=.*\bTOTAL\b)(?=.*\bLOGIN\b).*?(?=\r?\n|$)

grep -Pi '(?=.*\bNOAM\.CORP\.COM\b)(?=.*\bTOTAL\b)(?=.*\bLOGIN\b)' test.txt

-P, --perl-regexp         PATTERN is a Perl regular expression

 -i, --ignore-case         ignore case distinctions