83 lines
2.5 KiB
Groff
83 lines
2.5 KiB
Groff
.\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.50.1.
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.TH UNIQ "1" "April 2025" "GNU coreutils 9.7" "User Commands"
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.SH NAME
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uniq \- report or omit repeated lines
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.SH SYNOPSIS
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.B uniq
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[\fI\,OPTION\/\fR]... [\fI\,INPUT \/\fR[\fI\,OUTPUT\/\fR]]
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.SH DESCRIPTION
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.\" Add any additional description here
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.PP
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Filter adjacent matching lines from INPUT (or standard input),
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writing to OUTPUT (or standard output).
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.PP
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With no options, matching lines are merged to the first occurrence.
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.PP
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Mandatory arguments to long options are mandatory for short options too.
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.TP
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\fB\-c\fR, \fB\-\-count\fR
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prefix lines by the number of occurrences
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.TP
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\fB\-d\fR, \fB\-\-repeated\fR
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only print duplicate lines, one for each group
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.TP
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\fB\-D\fR
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print all duplicate lines
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.TP
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\fB\-\-all\-repeated\fR[=\fI\,METHOD\/\fR]
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like \fB\-D\fR, but allow separating groups
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with an empty line;
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METHOD={none(default),prepend,separate}
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.TP
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\fB\-f\fR, \fB\-\-skip\-fields\fR=\fI\,N\/\fR
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avoid comparing the first N fields
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.TP
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\fB\-\-group\fR[=\fI\,METHOD\/\fR]
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show all items, separating groups with an empty line;
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METHOD={separate(default),prepend,append,both}
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.TP
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\fB\-i\fR, \fB\-\-ignore\-case\fR
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ignore differences in case when comparing
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.TP
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\fB\-s\fR, \fB\-\-skip\-chars\fR=\fI\,N\/\fR
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avoid comparing the first N characters
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.TP
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\fB\-u\fR, \fB\-\-unique\fR
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only print unique lines
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.TP
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\fB\-z\fR, \fB\-\-zero\-terminated\fR
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line delimiter is NUL, not newline
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.TP
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\fB\-w\fR, \fB\-\-check\-chars\fR=\fI\,N\/\fR
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compare no more than N characters in lines
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.TP
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\fB\-\-help\fR
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display this help and exit
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.TP
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\fB\-\-version\fR
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output version information and exit
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.PP
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A field is a run of blanks (usually spaces and/or TABs), then non\-blank
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characters. Fields are skipped before chars.
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.PP
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\&'uniq' does not detect repeated lines unless they are adjacent.
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You may want to sort the input first, or use 'sort \fB\-u\fR' without 'uniq'.
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.SH AUTHOR
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Written by Richard M. Stallman and David MacKenzie.
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.SH "REPORTING BUGS"
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GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
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.br
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Report any translation bugs to <https://translationproject.org/team/>
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.SH COPYRIGHT
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Copyright \(co 2025 Free Software Foundation, Inc.
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License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
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.br
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This is free software: you are free to change and redistribute it.
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There is NO WARRANTY, to the extent permitted by law.
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.SH "SEE ALSO"
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\fBcomm\fP(1), \fBjoin\fP(1), \fBsort\fP(1)
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.PP
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.br
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Full documentation <https://www.gnu.org/software/coreutils/uniq>
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.br
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or available locally via: info \(aq(coreutils) uniq invocation\(aq
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