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}  Delim-
          iting 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





GNU coreutils 8.5    Last change: April 2010                    1






User Commands                                             UNIQ(1)



     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-coreutils@gnu.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  redistri-
     bute  it.   There is NO WARRANTY, to the extent permitted 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 8.5    Last change: April 2010                    2