UNIQ(1)                              BSD                               UNIQ(1)



NAME
     uniq - report repeated lines in a file

SYNOPSIS
     uniq [ -udc [ +n ] [ -n ] ] [ input [ output ] ]

DESCRIPTION
     uniq reads the input file, comparing adjacent lines.  Normally it removes
     the second and succeeding copies of repeated lines, and writes the
     remainder on the output file.  Repeated lines must be adjacent in order
     to be found; refer to sort(1) for more information on this. The normal
     mode output is the union of the -u and -d mode outputs.

OPTIONS
     -u        Output only the lines not repeated in the original file.

     -d        Write one copy of only the repeated lines.

     -c        Supersede the -u and -d options.  Generate an output report in
               default style, but with each line preceded by a count of the
               number of times it occurred.

     -n        Ignore the first n fields, together with any blanks before
               each.  A field is defined as a string of nonspace, nontab
               characters separated from adjacent characters by tabs and
               spaces.

     +n        Ignore the first n characters.  Fields are skipped before
               characters.

SEE ALSO
     comm(1), sort(1)