Copyright (c) 1985 The Regents of the University of California.
All rights reserved.
%sccs.include.proprietary.roff%
@(#)uniq.1 6.2 (Berkeley) 04/18/91
All rights reserved.
%sccs.include.proprietary.roff%
@(#)uniq.1 6.2 (Berkeley) 04/18/91
UNIQ 1 ""
.AT 3
NAME
uniq - report repeated lines in a file
SYNOPSIS
uniq [
-udc [
+ n ] [
- n ]
] [ input [ output ] ]
DESCRIPTION
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
sort (1). If the
-u flag is used, just the lines that are not repeated
in the original file are output. The
-d option specifies that one copy of just the repeated lines is to be written.
The normal mode output is the union of the
-u and
-d mode outputs.
The -c option supersedes -u and -d and generates an output report in default style but with each line preceded by a count of the number of times it occurred.
The n arguments specify skipping an initial portion of each line in the comparison:
8 - n The first 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.
8 + n The first n characters are ignored. Fields are skipped before characters.
"SEE ALSO"
sort(1), comm(1)