NAME
	  uniq - Removes or lists repeated lines in a file

     SYNOPSIS
	  uniq [-c | -d	| -u] [-f fields] [-s characters] [+number]
	  [-number] [input_file] [output_file]


	  The uniq command reads standard input	by default, or
	  input_file, compares adjacent	lines, removes the second and
	  succeeding occurrences of a line, and	writes to standard
	  output or the	specified file output_file.

     FLAGS
	  -c  Precedes each output line	with a count of	the number of
	      times each line appears in the file.  This flag super-
	      sedes -d and -u.

	  -d  Displays repeated	lines only.

	  -f fields
	      Ignores the first	fields fields on each input line when
	      doing comparisons, where fields is a positive decimal
	      integer.	A field	is the maximal string matched by the
	      basic regular expression:

	      [[:blank:]]*[^[:blank:]]*


	      If the fields argument specifies more fields than	appear
	      on an input line,	a null string is used for comparisons.

	  -s characters
	      Ignores the specified number of characters when doing
	      comparisons.  The	characters argument is a positive
	      decimal integer.

	      If specified with	the -f flag, the first characters
	      characters after the first fields	fields are ignored.
	      If the characters	argument specifies more	characters
	      than remain on an	input line, uniq uses a	null string
	      for comparison.

	  -u  Displays unique lines only.

	  -number
	      Skips over the first number-1 fields.  A field is	a
	      string of	nonspace, nontab characters separated by tabs
	      or spaces, or both, from adjacent	data on	the same line.
	      Equivalent to -f fields.	(Obsolescent)

	  +number
	      Skips over the first number-1 characters.	 Fields	speci-
	      fied by number are skipped before	characters.
	      Equivalent to -s characters.  (Obsolescent)


     DESCRIPTION
	  The input_file and output_file arguments must	specify	dif-
	  ferent files.

	  Repeated lines must be on consecutive	lines to be found.
	  You can arrange them with the	sort command before process-
	  ing.

     EXAMPLES
	  To delete repeated lines in the following file called	fruit
	  and save it to a file	named newfruit,	enter:

	  uniq fruit newfruit


	  The file fruit contains the following	lines:

	  apples
	  apples
	  bananas
	  cherries
	  cherries
	  peaches
	  pears


	  The file newfruit contains the following lines:

	  apples
	  peaches
	  pears
	  bananas
	  cherries



     RELATED INFORMATION
	  Commands:  comm(1), sort(1).