1 .\" Copyright (c) 1991, 1993
2 .\" The Regents of the University of California. All rights reserved.
4 .\" This code is derived from software contributed to Berkeley by
5 .\" the Institute of Electrical and Electronics Engineers, Inc.
7 .\" Redistribution and use in source and binary forms, with or without
8 .\" modification, are permitted provided that the following conditions
10 .\" 1. Redistributions of source code must retain the above copyright
11 .\" notice, this list of conditions and the following disclaimer.
12 .\" 2. Redistributions in binary form must reproduce the above copyright
13 .\" notice, this list of conditions and the following disclaimer in the
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15 .\" 3. All advertising materials mentioning features or use of this software
16 .\" must display the following acknowledgement:
17 .\" This product includes software developed by the University of
18 .\" California, Berkeley and its contributors.
19 .\" 4. Neither the name of the University nor the names of its contributors
20 .\" may be used to endorse or promote products derived from this software
21 .\" without specific prior written permission.
23 .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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35 .\" From: @(#)uniq.1 8.1 (Berkeley) 6/6/93
36 .\" $FreeBSD: src/usr.bin/uniq/uniq.1,v 1.5.2.5 2002/07/15 08:11:33 keramida Exp $
37 .\" $DragonFly: src/usr.bin/uniq/uniq.1,v 1.2 2003/06/17 04:29:33 dillon Exp $
44 .Nd report or filter out repeated lines in a file
47 .Op Fl c | Fl d | Fl u
58 utility reads the specified
60 comparing adjacent lines, and writes a copy of each unique input line to
67 or absent, the standard input is read.
70 is absent, standard output is used for output.
71 The second and succeeding copies of identical adjacent input lines are
73 Repeated lines in the input will not be detected if they are not adjacent,
74 so it may be necessary to sort the files first.
76 The following options are available:
79 Precede each output line with the count of the number of times the line
80 occurred in the input, followed by a single space.
82 Only output lines that are repeated in the input.
86 fields in each input line when doing comparisons.
87 A field is a string of non-blank characters separated from adjacent fields
89 Field numbers are one based, i.e. the first field is field one.
93 characters in each input line when doing comparisons.
94 If specified in conjunction with the
98 characters after the first
100 fields will be ignored.
101 Character numbers are one based, i.e. the first character is character one.
103 Only output lines that are not repeated in the input.
105 Case insensitive comparison of lines.
107 .\"(Deprecated; replaced by
109 .\"Ignore the first n
110 .\"fields on each input line when doing comparisons,
111 .\"where n is a number.
112 .\"A field is a string of non-blank
113 .\"characters separated from adjacent fields
115 .\".It Cm \&\(pl Ns Ar n
116 .\"(Deprecated; replaced by
120 .\"characters when doing comparisons, where
126 If additional arguments are specified on the command line, the first
127 argument is used as the name of an input file, the second is used
128 as the name of an output file.
133 .Cm \&\(pl Ns Ar number
136 options have been deprecated but are still supported in this implementation.
142 utility is expected to be