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uniq (1)
  • >> uniq (1) ( Solaris man: Команды и прикладные программы пользовательского уровня )
  • uniq (1) ( FreeBSD man: Команды и прикладные программы пользовательского уровня )
  • uniq (1) ( Русские man: Команды и прикладные программы пользовательского уровня )
  • uniq (1) ( Linux man: Команды и прикладные программы пользовательского уровня )
  • uniq (1) ( POSIX man: Команды и прикладные программы пользовательского уровня )
  •  

    NAME

    uniq - report or filter out repeated lines in a file
     
    

    SYNOPSIS

     

    /usr/bin/uniq

    /usr/bin/uniq [-c | -d | -u] [-f fields] [-s char] 
        [input_file [output_file]]
    

    /usr/bin/uniq [-c | -d | -u] [-n] [+ m] [input_file [output_file]]
    

     

    ksh93

    uniq [-cdiu] [-D[delimit]] [-f fields] [-s chars] [-w chars] 
        [input_file [output_file]]
    

    uniq [-cdiu] [-D[delimit]] [-n] [+m] [-w chars] [input_file [output_file]]
    

     

    DESCRIPTION

     

    /usr/bin/uniq

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

    Repeated lines in the input are not detected if they are not adjacent.  

    ksh93

    The uniq built-in in ksh93 is associated with the /bin or /usr/bin path. It is invoked when uniq is executed without a pathname prefix and the pathname search finds a /bin/uniq or /usr/bin/uniq executable.

    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 output_file is not specified, uniq writes to standard output. If input_file is not specified, or if input_file is -, uniq reads from standard input, and the start of the file is defined as the current offset.  

    OPTIONS

     

    /usr/bin/uniq

    The following options are supported by /usr/bin/uniq:

    -c

    Precedes each output line with a count of the number of times the line occurred in the input.

    -d

    Suppresses the writing of lines that are not repeated in the input.

    -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 fields specifies more fields than appear on an input line, a null string is used for comparison.

    +m

    Equivalent to -s chars with chars set to m.

    -n

    Equivalent to -f fields with fields set to n.

    -s chars

    Ignores the first chars characters when doing comparisons, where chars is a positive decimal integer. If specified in conjunction with the -f option, the first chars characters after the first fields fields is ignored. If chars specifies more characters than remain on an input line, a null string is used for comparison.

    -u

    Suppresses the writing of lines that are repeated in the input.

     

    ksh93

    The following options are supported by the uniq built-in command is ksh93:

    -c
    --count

    Outputs the number of times each line occurred along with the line.

    -d
    --repeated | duplicates

    Outputs only duplicate lines.

    -D
    --all-repeated[=delimit]

    Outputs all duplicate lines as a group with an empty line delimiter specified by delimit.

    Specify delimit as one of the following:

    none

    Do not delimit duplicate groups.

    prepend

    Prepend an empty line before each group.

    separate

    Separate each group with an empty line.

    The value for delimit can be omitted. The default value is none.

    -f
    --skip-fields=fields

    Skips over fields number of fields before checking for uniqueness. A field is the minimal string matching the BRE [[:blank:]]*[^[:blank:]]*.

    -i
    --ignore-case

    Ignore case in comparisons.

    +m

    Equivalent to the -s chars option, with chars set to m.

    -n

    Equivalent to the -f fields option, with fields set to n.

    -s
    --skip-chars=chars

    Skips over chars number of characters before checking for uniqueness.

    If specified with the -f option, the first chars after the first fields are ignored. If the chars specifies more characters than are on the line, an empty string is used for comparison.

    -u
    --uniq

    Outputs unique lines.

    -w
    --check-chars=chars

    Skips over any specified fields and characters, then compares chars number of characters.

     

    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 is used.

    output_file

    A path name of the output file. If output_file is not specified, the standard output is 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:

    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 attributes:  

    /usr/bin/uniq

    ATTRIBUTE TYPEATTRIBUTE VALUE

    AvailabilitySUNWesu

    CSI

    Interface Stability

    Standard

     

    ksh93

    ATTRIBUTE TYPEATTRIBUTE VALUE

    AvailabilitySUNWcsu

    Interface Stability

    The ksh93 built-in binding to /bin and /usr/bin is Volatile. The built-in interfaces are Uncommitted.  

    SEE ALSO

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


     

    Index

    NAME
    SYNOPSIS
    /usr/bin/uniq
    ksh93
    DESCRIPTION
    /usr/bin/uniq
    ksh93
    OPTIONS
    /usr/bin/uniq
    ksh93
    OPERANDS
    EXAMPLES
    ENVIRONMENT VARIABLES
    EXIT STATUS
    ATTRIBUTES
    /usr/bin/uniq
    ksh93
    SEE ALSO


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