[unix-history] / usr / src / usr.bin / uniq / uniq.1

.\"	@(#)uniq.1	4.1 (Berkeley) %G%
.\"
.TH UNIQ 1 
.AT 3
.SH NAME
uniq \- report repeated lines in a file
.SH SYNOPSIS
.B uniq
[
.B \-udc
[
.BR + n
] [
.BR \- n
]
] [ input [ output ] ]
.SH DESCRIPTION
.I Uniq
reads the input
file comparing adjacent lines.
In the normal case, the second and succeeding copies
of repeated lines are
removed; the remainder is written on the output file.
Note that repeated lines must be adjacent
in order to be found;
see
.IR  sort (1).
If the
.B \-u
flag is used,
just the lines that are not repeated
in the original file are output.
The
.B \-d
option specifies that
one copy of just the repeated lines is to
be written.
The normal mode output is the union of the
.B \-u
and
.B \-d
mode outputs.
.PP
The
.B \-c
option supersedes
.B \-u
and
.B \-d
and generates
an output report in default style
but with each line preceded by a count of the
number of times it occurred.
.PP
The
.I n
arguments specify skipping an initial portion of each line
in the comparison:
.TP 8
.BI \- n
The first
.IR n 
fields
together with any blanks before each are ignored.
A field is defined as a string of non-space, non-tab characters
separated by tabs and spaces from its neighbors.
.TP 8
.BI + n
The first
.IR n 
characters are ignored.
Fields are skipped before characters.
.PP
.SH "SEE ALSO"
sort(1), comm(1)
Commit	Line	Data
f2028daa KM	1	.\" @(#)uniq.1 4.1 (Berkeley) %G%
	2	.\"
	3	.TH UNIQ 1
	4	.AT 3
	5	.SH NAME
	6	uniq \- report repeated lines in a file
	7	.SH SYNOPSIS
	8	.B uniq
	9	[
	10	.B \-udc
	11	[
	12	.BR + n
	13	] [
	14	.BR \- n
	15	]
	16	] [ input [ output ] ]
	17	.SH DESCRIPTION
	18	.I Uniq
	19	reads the input
	20	file comparing adjacent lines.
	21	In the normal case, the second and succeeding copies
	22	of repeated lines are
	23	removed; the remainder is written on the output file.
	24	Note that repeated lines must be adjacent
	25	in order to be found;
	26	see
	27	.IR sort (1).
	28	If the
	29	.B \-u
	30	flag is used,
	31	just the lines that are not repeated
	32	in the original file are output.
	33	The
	34	.B \-d
	35	option specifies that
	36	one copy of just the repeated lines is to
	37	be written.
	38	The normal mode output is the union of the
	39	.B \-u
	40	and
	41	.B \-d
	42	mode outputs.
	43	.PP
	44	The
	45	.B \-c
	46	option supersedes
	47	.B \-u
	48	and
	49	.B \-d
	50	and generates
	51	an output report in default style
	52	but with each line preceded by a count of the
	53	number of times it occurred.
	54	.PP
	55	The
	56	.I n
	57	arguments specify skipping an initial portion of each line
	58	in the comparison:
	59	.TP 8
	60	.BI \- n
	61	The first
	62	.IR n
	63	fields
	64	together with any blanks before each are ignored.
65	A field is defined as a string of non-space, non-tab characters
66	separated by tabs and spaces from its neighbors.
67	.TP 8
68	.BI + n
69	The first
70	.IR n
71	characters are ignored.
72	Fields are skipped before characters.
73	.PP
74	.SH "SEE ALSO"
75	sort(1), comm(1)