.Dd 2015-10-08
.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 num
.Op Fl s Ar num
.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
.Nm
reads from stdin. If no
.Ar output
file is given
.Nm
writes to stdout.
.Sh OPTIONS
.Bl -tag -width Ds
.It Fl c
Prefix each line with the number of consecutive occurrences in
.Ar input .
.It Fl d | Fl u
Print duplicate | unique lines only.
.It Fl f Ar num | Fl s Ar num
Ignore the first
.Ar num
fields | characters in each input line when doing comparisons.
.El
.Sh STANDARDS
The
.Nm
utility is compliant with the
.St -p1003.1-2013
specification.