uniq man page on HP-UX

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uniq(1)								       uniq(1)

       uniq - report repeated lines in a file

       fields] chars] [input_file [output_file]]

       reads  the  input  text	file input_file, comparing adjacent lines, and
       copies the result to output_file.  If input_file is not specified,  the
       standard	 input	and standard output are used.  If input_file is speci‐
       fied, but output_file is not, results are printed to  standard  output.
       input_file and output_file must not be the same file.

   Line-Comparison Options
       recognizes the following options when comparing adjacent lines:

	      Print   those lines that are repeated in the original file.

	      Print   copy only of each repeated line in the input file.

	      Generate an output report in default style
		      except that each line is preceded by a count of the num‐
		      ber of times it occurred.	 If this option is  specified,
		      the  and	options are ignored if either or both are also

       If none of the options or are present, prints the results of the	 union
       of  the	and  options, producing a copy of the original input file with
       the second and succeeding copies of any repeated lines removed.	 (Note
       that  repeated  lines  must  be	adjacent  in  order  to be found — see

   Field-Skip Options
       Two options are provided for skipping an initial portion of  each  line
       when making comparisons:

	      Ignore the first
			     fields  fields,  together	with any blanks before
			     each.  fields is a positive decimal  integer.   A
			     field  is	defined as a string of non-space, non-
			     tab characters separated by  tabs	and/or	spaces
			     from its neighbors.

	      Ignore the first
			     chars  characters.	  chars	 is a positive decimal
			     integer.  Each line in the input is assumed to be
			     terminated with a new line character for purposes
			     of comparison.  Fields are skipped before charac‐

   Environment Variables
       must be equal to the value it had when the input files were sorted.

       determines  the	interpretation	of text within files as single- and/or
       multi-byte characters, and defines a space character when the or option
       is used.

       determines the language in which messages are displayed.

       If  or  is  not	specified  in  the  environment or is set to the empty
       string, the value of is used as a default for each unspecified or empty
       variable.  If is not specified or is set to the empty string, a default
       of "C" (see lang(5)) is used instead  of	 If  any  internationalization
       variable	 contains an invalid setting, behaves as if all international‐
       ization variables are set to "C".  See environ(5).

   International Code Set Support
       Single- and multi-byte character code sets are supported.

       Exit values are:

	       0      Successful completion.
	      >0      Error condition occurred.

       was developed by OSF and HP.

       comm(1), sort(1).


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