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UNIQ(1)                          User Commands                         UNIQ(1)



NAME
       uniq - report or omit repeated lines

SYNOPSIS
       uniq [OPTION]... [INPUT [OUTPUT]]

DESCRIPTION
       Filter adjacent matching lines from INPUT (or standard input), writing to OUTPUT (or standard output).

       With no options, matching lines are merged to the first occurrence.

       Mandatory arguments to long options are mandatory for short options too.

       -c, --count
              prefix lines by the number of occurrences

       -d, --repeated
              only print duplicate lines

       -D, --all-repeated[=delimit-method]
              print  all duplicate lines delimit-method={none(default),prepend,separate} Delimiting is done with blank
              lines.

       -f, --skip-fields=N
              avoid comparing the first N fields

       -i, --ignore-case
              ignore differences in case when comparing

       -s, --skip-chars=N
              avoid comparing the first N characters

       -u, --unique
              only print unique lines

       -z, --zero-terminated
              end lines with 0 byte, not newline

       -w, --check-chars=N
              compare no more than N characters in lines

       --help display this help and exit

       --version
              output version information and exit

       A field is a run of blanks (usually spaces and/or TABs), then non-blank characters.  Fields are skipped  before
       chars.

       Note: 'uniq' does not detect repeated lines unless they are adjacent.  You may want to sort the input first, or
       use 'sort -u' without 'uniq'.  Also, comparisons honor the rules specified by 'LC_COLLATE'.

AUTHOR
       Written by Richard M. Stallman and David MacKenzie.

REPORTING BUGS
       Report uniq bugs to bug-coreutilsATgnu.org
       GNU coreutils home page: <http://www.gnu.org/software/coreutils/>;
       General help using GNU software: <http://www.gnu.org/gethelp/>;
       Report uniq translation bugs to <http://translationproject.org/team/>;

COPYRIGHT
       Copyright  (C)  2010  Free  Software  Foundation,  Inc.   License  GPLv3+:   GNU   GPL   version   3   or   later
       <http://gnu.org/licenses/gpl.html>;.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permit-
       ted by law.

SEE ALSO
       comm(1), join(1)

       The full documentation for uniq is maintained as a Texinfo manual.  If the info and uniq programs are  properly
       installed at your site, the command

              info coreutils 'uniq invocation'

       should give you access to the complete manual.



GNU coreutils 8.4                 March 2017                           UNIQ(1)