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uniq


SYNOPSIS

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


DESCRIPTION

       Discard  all but one of successive identical lines from INPUT (or stan-
       dard input), writing to OUTPUT (or standard output).

       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

       -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 whitespace, then non-whitespace characters.  Fields
       are skipped before chars.


AUTHOR

       Written by Richard Stallman and David MacKenzie.


REPORTING BUGS

       Report bugs to <bug-coreutils@gnu.org>.


COPYRIGHT

       Copyright (C) 2006 Free Software Foundation, Inc.
       This  is  free  software.   You may redistribute copies of it under the


uniq 5.97 March 2012 UNIQ(1)



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