uniq.1

Unix操作系统minix 2.0源码

.TH UNIQ 1
.SH NAME
uniq \- delete consecutive identical lines in a file
.SH SYNOPSIS
\fBuniq\fR [\fB\-cdu\fR]\fR [\fB\-\fIn\fR] [\fB+\fIn\fR] [\fIinput [\fIoutput\fR]\fR]\fR
.br
.de FL
.TP
\\fB\\$1\\fR
\\$2
..
.de EX
.TP 20
\\fB\\$1\\fR
# \\$2
..
.SH OPTIONS
.FL "\-c" "Give count of identical lines in the input"
.FL "\-d" "Only duplicate lines are written to output"
.FL "\-u" "Only unique lines are written to output"
.FL "\-\fIn\fR" "Skip the first \fIn\fR columns when matching"
.FL "+\fIn\fR" "Skip the first \fIn\fR fields when matching"
.SH EXAMPLES
.EX "uniq +2 file" "Ignore first 2 fields when comparing"
.EX "uniq \-d inf outf" "Write duplicate lines to \fIoutf\fP"
.SH DESCRIPTION
.PP
.I Uniq
examines a file for consecutive lines that are identical.
All but duplicate entries are deleted, and the file is written to output.
The +\fIn\fR option skips the first \fIn\fR fields, where a field is defined
as a run of characters separated by white space.
The \-\fIn\fP option skips the first \fIn\fR spaces.
Fields are skipped first.
.SH "SEE ALSO"
.BR sort (1).