sbase/uniq.1

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.Dd January 30, 2015
.Dt UNIQ 1
.Os sbase
.Sh NAME
.Nm uniq
.Nd report or filter out repeated lines in a file
.Sh SYNOPSIS
.Nm
.Op Fl c
.Op Fl d | u
.Op Fl f Ar fields
.Op Fl s Ar chars
.Op Ar input Op Ar output
.Sh DESCRIPTION
.Nm
reads the
.Ar input
file and writes one copy of a line from each group of consecutive
duplicate lines to the
.Ar output
file. If no
.Ar input
file is given,
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.Nm
reads from stdin. If no
.Ar output
file is given, then
.Nm
writes to stdout.
.Sh OPTIONS
.Bl -tag -width Ds
.It Fl c
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Prefixes each line with a count of its consecutive occurrences in the input.
.It Fl d
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Suppresses non-duplicate lines (thus 'uniq -d' prints only duplicates).
.It Fl u
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Suppresses non-unique lines (thus 'uniq -u' prints only uniques).
.It Fl f Ar fields
Ignore the first
.Ar fields
in each input line when doing comparisons.
.It Fl s Ar chars
Ignore the first
.Ar chars
characters in each input line when doing comparisons.
.El
.Sh STANDARDS
The
.Nm
utility is compliant with the
.St -p1003.1-2008
specification.