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1 | .\" Copyright (c) 1991, 1993 |
2 | .\" The Regents of the University of California. All rights reserved. | |
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4 | .\" This code is derived from software contributed to Berkeley by |
5 | .\" the Institute of Electrical and Electronics Engineers, Inc. | |
6 | .\" | |
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7 | .\" Redistribution and use in source and binary forms, with or without |
8 | .\" modification, are permitted provided that the following conditions | |
9 | .\" are met: | |
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 | |
14 | .\" documentation and/or other materials provided with the distribution. | |
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. | |
94bed826 | 22 | .\" |
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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 | |
28 | .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
29 | .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
30 | .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
31 | .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
32 | .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
33 | .\" SUCH DAMAGE. | |
f2028daa | 34 | .\" |
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35 | .\" @(#)uniq.1 8.1 (Berkeley) 6/6/93 |
36 | .\" | |
37 | .Dd June 6, 1993 | |
2b795bbe CL |
38 | .Dt UNIQ 1 |
39 | .Os | |
40 | .Sh NAME | |
41 | .Nm uniq | |
675f9da4 | 42 | .Nd report or filter out repeated lines in a file |
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43 | .Sh SYNOPSIS |
44 | .Nm uniq | |
45 | .Op Fl c | Fl d | Fl u | |
46 | .Op Fl f Ar fields | |
47 | .Op Fl s Ar chars | |
48 | .Oo | |
49 | .Ar input_file | |
50 | .Op Ar output_file | |
51 | .Oc | |
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52 | .Sh DESCRIPTION |
53 | The | |
54 | .Nm uniq | |
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55 | utility reads the standard input comparing adjacent lines, and writes |
56 | a copy of each unique input line to the standard output. | |
57 | The second and succeeding copies of identical adjacent input lines are | |
58 | not written. | |
59 | Repeated lines in the input will not be detected if they are not adjacent, | |
60 | so it may be necessary to sort the files first. | |
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61 | .Pp |
62 | The following options are available: | |
63 | .Bl -tag -width Ds | |
64 | .It Fl c | |
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65 | Precede each output line with the count of the number of times the line |
66 | occurred in the input, followed by a single space. | |
2b795bbe | 67 | .It Fl d |
675f9da4 | 68 | Don't output lines that are not repeated in the input. |
2b795bbe | 69 | .It Fl f Ar fields |
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70 | Ignore the first |
71 | .Ar fields | |
72 | in each input line when doing comparisons. | |
73 | A field is a string of non-blank characters separated from adjacent fields | |
2b795bbe | 74 | by blanks. |
675f9da4 | 75 | Field numbers are one based, i.e. the first field is field one. |
2b795bbe | 76 | .It Fl s Ar chars |
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77 | Ignore the first |
78 | .Ar chars | |
79 | characters in each input line when doing comparisons. | |
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80 | If specified in conjunction with the |
81 | .Fl f | |
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82 | option, the first |
83 | .Ar chars | |
84 | characters after the first | |
85 | .Ar fields | |
86 | fields will be ignored. | |
87 | Character numbers are one based, i.e. the first character is character one. | |
2b795bbe | 88 | .It Fl u |
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89 | Don't output lines that are repeated in the input. |
90 | .\".It Fl Ns Ar n | |
91 | .\"(Deprecated; replaced by | |
92 | .\".Fl f ) . | |
93 | .\"Ignore the first n | |
94 | .\"fields on each input line when doing comparisons, | |
95 | .\"where n is a number. | |
96 | .\"A field is a string of non-blank | |
97 | .\"characters separated from adjacent fields | |
98 | .\"by blanks. | |
99 | .\".It Cm \&\(pl Ns Ar n | |
100 | .\"(Deprecated; replaced by | |
101 | .\".Fl s ) . | |
102 | .\"Ignore the first | |
103 | .\".Ar m | |
104 | .\"characters when doing comparisons, where | |
105 | .\".Ar m | |
106 | .\"is a | |
107 | .\"number. | |
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108 | .El |
109 | .Pp | |
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110 | If additional arguments are specified on the command line, the first |
111 | such argument is used as the name of an input file, the second is used | |
112 | as the name of an output file. | |
2b795bbe | 113 | .Pp |
f2028daa | 114 | The |
675f9da4 | 115 | .Nm uniq |
2b795bbe | 116 | utility exits 0 on success, and >0 if an error occurs. |
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117 | .Sh COMPATIBILITY |
118 | The historic | |
119 | .Cm \&\(pl Ns Ar number | |
120 | and | |
121 | .Fl Ns Ar number | |
122 | options have been deprecated but are still supported in this implementation. | |
123 | .Sh SEE ALSO | |
124 | .Xr sort 1 | |
2b795bbe | 125 | .Sh STANDARDS |
f2028daa | 126 | The |
675f9da4 | 127 | .Nm uniq |
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128 | utility is expected to be |
129 | .St -p1003.2 | |
130 | compatible. |