uniq

 

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 User Commands                                             uniq(1)
 
 
 


NAME
      uniq - report or filter out repeated lines in a file
 


SYNOPSIS
      uniq [ -c | -d  | -u ]   [  -f fields  ]   [  -s char  ]   [
      input_file  [ output_file ]  ]
 
      uniq [ -c | -d  | -u ]  [ -n ]  [  +  m   ]   [   input_file
      [ output_file ]  ]
 


DESCRIPTION
      The uniq utility will read an input file comparing  adjacent
      lines,  and write one copy of each input line on the output.
      The second and succeeding copies of repeated adjacent  input
      lines will not be written.
 
      Repeated lines in the input will not be detected if they are
      not adjacent.
 


OPTIONS
      The following options are supported:
 
      -c    Precede each output line with a count of the number of
            times the line occurred in the input.
 
      -d    Suppress the writing of lines that are not repeated in
            the input.
 
      -f fields
            Ignore 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 fields specifies more  fields  than  appear  on  an
            input line, a null string will be used for comparison.
 
      -s chars
            Ignore the first chars characters when doing comparis-
            ons,  where  chars  is  a positive decimal integer. If
            specified in conjunction with the -f option, the first
            chars characters after the first fields fields will be
            ignored.  If  chars  specifies  more  characters  than
            remain  on  an  input line, a null string will be used
            for comparison.
 
      -u    Suppress the writing of lines that are repeated in the
            input.
 
 
 
 SunOS 5.8           Last change: 20 Dec 1996                    1
 
 
 
 
 
 
 User Commands                                             uniq(1)
 
 
 
      -n    Equivalent to -f fields with fields set to n.
 
      +m    Equivalent to -s chars with chars set to m.
 


OPERANDS
      The following operands are supported:
 
      input_file
            A path name of the input file. If  input_file  is  not
            specified,  or  if  the  input_file is -, the standard
            input will be used.
 
      output_file
            A path name of the output file. If output_file is  not
            specified,  the  standard  output  will  be  used. The
            results  are  unspecified  if  the   file   named   by
            output_file is the file named by input_file.
 
 EXAMPLES
      Example 1: Using The uniq Command
 
      The following example lists the contents  of  the  uniq.test
      file and outputs a copy of the repeated lines.
 
      example% cat uniq.test
      This is a test.
      This is a test.
      TEST.
      Computer.
      TEST.
      TEST.
      Software.
 
      example% uniq -d uniq.test
      This is a test.
      TEST.
      example%
 
      The next example outputs  just  those  lines  that  are  not
      repeated in the uniq.test file.
 
      example% uniq -u uniq.test
      TEST.
      Computer.
      Software.
      example%
 
      The last example outputs a report with each line preceded by
      a  count  of  the  number of times each line occurred in the
      file:
 
 
 
 
 
 SunOS 5.8           Last change: 20 Dec 1996                    2
 
 
 
 
 
 
 User Commands                                             uniq(1)
 
 
 
      example% uniq -c uniq.test
         2 This is a test.
         1 TEST.
         1 Computer.
         2 TEST.
         1 Software.
      example%
 
 ENVIRONMENT VARIABLES
      See environ(5) for descriptions of the following environment
      variables  that  affect  the  execution  of  uniq: LC_CTYPE,
      LC_MESSAGES, and NLSPATH.
 
 EXIT STATUS
      The following exit values are returned:
 
      0     Successful completion.
 
      >0    An error occurred.
 


ATTRIBUTES
      See attributes(5) for descriptions of the  following  attri-
      butes:
 
      ____________________________________________________________
     |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
     |_____________________________|_____________________________|
     | Availability                | SUNWesu                     |
     |_____________________________|_____________________________|
     | CSI                         | Enabled                     |
     |_____________________________|_____________________________|
 
 


SEE ALSO
      comm(1), pack(1), pcat(1),  sort(1),  uncompress(1),  attri-
      butes(5), environ(5)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 SunOS 5.8           Last change: 20 Dec 1996                    3
 
 
 

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