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-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  © 2011 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 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  com‐
       mand

              info coreutils 'uniq invocation'

       should give you access to the complete manual.



GNU coreutils 8.12.197-032bb     September 2011                          UNIQ(1)