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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, one for each group

       -D, --all-repeated[=METHOD]
	      print  all duplicate lines groups can be delimited with an empty
	      line METHOD={none(default),prepend,separate}

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

       --group[=METHOD]
	      show  all	 items,	 separating  groups   with   an	  empty	  line
	      METHOD={separate(default),prepend,append,both}

       -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'.

       GNU  coreutils  online  help:  <http://www.gnu.org/software/coreutils/>
       Report uniq translation bugs to <http://translationproject.org/team/>

AUTHOR
       Written by Richard M. Stallman and David MacKenzie.

COPYRIGHT
       Copyright  (C) 2013 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), sort(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 8.22		 November 2020			       UNIQ(1)