2011-03-30 13:49:47 +00:00
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.TH UNIQ 1
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.SH NAME
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uniq \- report repeated lines in a file
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.SH SYNOPSIS
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.B uniq
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[
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2014-05-03 09:38:36 +00:00
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.B -udcs
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2011-03-30 13:49:47 +00:00
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[
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.BI +- num
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]
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]
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[
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.I file
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]
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.SH DESCRIPTION
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.I Uniq
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copies the input
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.IR file ,
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or the standard input, to the
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standard output, comparing adjacent lines.
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In the normal case, the second and succeeding copies
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of repeated lines are
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removed.
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Repeated lines must be adjacent
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in order to be found.
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.TP
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.B -u
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Print unique lines.
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.TP
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.B -d
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Print (one copy of) duplicated lines.
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.TP
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.B -c
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Prefix a repetition count and a tab to each output line.
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Implies
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.B -u
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and
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.BR -d .
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.TP
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2014-05-03 09:38:36 +00:00
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.B -s
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Count as a duplicate if the prefix matches the previous unique line.
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.TP
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2011-03-30 13:49:47 +00:00
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.BI - num
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The first
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.IR num
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fields
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together with any blanks before each are ignored.
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A field is defined as a string of non-space, non-tab characters
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separated by tabs and spaces from its neighbors.
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.TP
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.BI + num
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The first
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.IR num
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characters are ignored.
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Fields are skipped before characters.
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.SH SOURCE
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.B /sys/src/cmd/uniq.c
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.SH "SEE ALSO"
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.IR sort (1)
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.SH BUGS
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Field selection and comparison should be compatible with
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.IR sort (1).
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