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From: William Cheswick <ches@cheswick.com>
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Subject: Re: [TUHS] Command line options and complexity
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My use for rev(1):

uniq(1)=E2=80=99s -f <n> ignores the first <n> fields of a line.  If you =
want it to ignore the last <n> fields:

rev | uniq -f <n> | rev

ches