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Perl one-liner parsing

Comment:

I've been trying to figure out how this Perl one-liner is suppose to work: perl -ne 'print "$1\n" if /rule\s\d/' It's not working. It suppose to locate the word "rule" in the log file and output the rule # next to the word “rule” as listed in the URL. http://www.brandonhutchinson.com/Ch... Thank for your help.

Name: FishMonger
Date: November 9, 2007 at 16:24:09 Pacific

Reply:

I'd need to see some example lines from your log file, but off hand I'd say the problem is that you're not using any quantifiers and you're not using parens to capture your data. Try this: perl -ne 'print "$1\n" if /(rule\s+\d+)/' file.log

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