1 .TH UNIQ 1
2 .SH NAME
3 uniq \- report repeated lines in a file
4 .SH SYNOPSIS
5 .B uniq
6 [
7 .B -udc
8 [
9 .BI +- num
10 ]
11 ]
12 [
13 .I file
14 ]
15 .SH DESCRIPTION
16 .I Uniq
17 copies the input
18 .IR file ,
19 or the standard input, to the
20 standard output, comparing adjacent lines.
21 In the normal case, the second and succeeding copies
22 of repeated lines are
23 removed.
24 Repeated lines must be adjacent
25 in order to be found.
26 .TP
27 .B -u
28 Print unique lines.
29 .TP
30 .B -d
31 Print (one copy of) duplicated lines.
32 .TP
33 .B -c
34 Prefix a repetition count and a tab to each output line.
35 Implies
36 .B -u
37 and
38 .BR -d .
39 .TP
40 .BI - num
41 The first
42 .IR num
43 fields
44 together with any blanks before each are ignored.
45 A field is defined as a string of non-space, non-tab characters
46 separated by tabs and spaces from its neighbors.
47 .TP
48 .BI + num
49 The first
50 .IR num
51 characters are ignored.
52 Fields are skipped before characters.
53 .SH SOURCE
54 .B \*9/src/cmd/uniq.c
55 .SH "SEE ALSO"
56 .IR sort (1) 
57 .SH BUGS
58 Field selection and comparison should be compatible with 
59 .MR sort (1) .