[unix-history] / usr / man / man1 / uniq.1

.TH UNIQ 1 
.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
e6817382 BJ	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	.BR + n
	10	] [
	11	.BR \- n
	12	]
	13	] [ input [ output ] ]
	14	.SH DESCRIPTION
	15	.I Uniq
	16	reads the input
	17	file comparing adjacent lines.
	18	In the normal case, the second and succeeding copies
	19	of repeated lines are
	20	removed; the remainder is written on the output file.
	21	Note that repeated lines must be adjacent
	22	in order to be found;
	23	see
	24	.IR sort (1).
	25	If the
	26	.B \-u
	27	flag is used,
	28	just the lines that are not repeated
	29	in the original file are output.
	30	The
	31	.B \-d
	32	option specifies that
	33	one copy of just the repeated lines is to
	34	be written.
	35	The normal mode output is the union of the
	36	.B \-u
	37	and
	38	.B \-d
	39	mode outputs.
	40	.PP
	41	The
	42	.B \-c
	43	option supersedes
	44	.B \-u
	45	and
	46	.B \-d
	47	and generates
	48	an output report in default style
	49	but with each line preceded by a count of the
	50	number of times it occurred.
	51	.PP
	52	The
	53	.I n
	54	arguments specify skipping an initial portion of each line
	55	in the comparison:
	56	.TP 8
	57	.BI \- n
	58	The first
	59	.IR n
	60	fields
	61	together with any blanks before each are ignored.
	62	A field is defined as a string of non-space, non-tab characters
	63	separated by tabs and spaces from its neighbors.
	64	.TP 8
65	.BI + n
66	The first
67	.IR n
68	characters are ignored.
69	Fields are skipped before characters.
70	.PP
71	.SH "SEE ALSO"
72	sort(1), comm(1)