User Commands                                             uniq(1)



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

SYNOPSIS
  /usr/bin/uniq
     /usr/bin/uniq [ options ] [infile [outfile]]


  ksh93
     uniq [ options ] [infile [outfile]]

DESCRIPTION
     uniq reads an input, comparing adjacent lines, and writing one
     copy of each input line on the output. The second and succeeding
     copies of the repeated adjacent lines are not written.

     If the output file, outfile, is not specified, uniq writes to
     standard output. If no infile is given, or if the infile is -,
     uniq reads from standard input with the start of the file is
     defined as the current offset.

OPTIONS
     The following options are supported:

     -c, --count     Output the number of times each line occurred
                     along with the line.

     -d, --repeated|duplicates
                     Output the first of each duplicate line.

     -D, --all-repeated[=delimit]
                     Output all duplicate lines as a group with an
                     empty line delimiter specified by delimit:
                       none  Do not delimit duplicate groups.
                       prepend
                             Prepend an empty line before each group.
                       separate
                             Separate each group with an empty line.
                     e option value may be omitted. The default value
                     is none.

     -f, --skip-fields=fields
                     fields is the number of fields to skip over
                     before checking for uniqueness. A field is the
                     minimal string matching the BRE
                     [[:blank:]]*[^[:blank:]]*.

     -i, --ignore-case
                     Ignore case in comparisons.

     -s, --skip-chars=chars
                     chars is the number of characters to skip over
                     before checking for uniqueness. If specified
                     along with -f, the first chars after the first
                     fields are ignored. If the chars specifies more
                     characters than are on the line, an empty string
                     will be used for comparison.

     -u, --unique    Output unique lines.

     -w, --check-chars=chars
                     chars is the number of characters to compare
                     after skipping any specified fields and
                     characters.

     -n              Equivalent to -f fields with fields set to n.

     +m              Equivalent to -s chars with chars set to m.

     --man, --html, --nroff
                     Prints builtin manual page in either plain text,
                     HTML or nroff format.
     --help          Prints basic help information
     --version       Prints version information

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.



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User Commands                                             uniq(1)



     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:

     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: LANG, LC_ALL,
     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:










SunOS 5.10          Last change: 20 Dec 1996                    3






User Commands                                             uniq(1)



     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Availability                | SUNWcsu                     |
    |_____________________________|_____________________________|
    | CSI                         | Enabled                     |
    |_____________________________|_____________________________|
    | Interface Stability         | Standard                    |
    |_____________________________|_____________________________|


SEE ALSO
     comm(1), pack(1), pcat(1), ksh93(1), sort(1),  uncompress(1),
     attributes(5), environ(5), standards(5)









































SunOS 5.10          Last change: 20 Dec 1996                    4