Date: Fri, 13 Aug 2010 16:01:34 +0200 From: Jonathan McKeown <j.mckeown@ru.ac.za> To: freebsd-questions@freebsd.org Subject: Re: Grepping a list of words Message-ID: <201008131601.34182.j.mckeown@ru.ac.za> In-Reply-To: <3.0.1.32.20100813084738.00ee5c48@sage-american.com> References: <867hjv92r2.fsf@gmail.com> <3.0.1.32.20100813084738.00ee5c48@sage-american.com>
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On Friday 13 August 2010 15:47:38 Jack L. Stone wrote: > The only thing it didn't do for me was the next step. My final objective > was to really determine the words in the "word.file" that were not in the > "main.file." I figured finding matches would be easy and then could then > run a sort|uniq comparison to determine the "new words" not yet in the > main.file. > > Since I will have a need to run this check frequently, any suggestions for > a better approach are welcome. sort -u and comm(1)? comm will compare two sorted files and produce up to three lists: of words only in file one, of words only in file 2 and of words common to both files. You can suppress any or all of the output lists. Jonathan
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