uniq

UNIQ(1)                     General Commands Manual                    UNIQ(1)



NAME
       uniq - report repeated lines in a file

SYNOPSIS
       uniq [ -udc [ +-num ] ] [ file ]

DESCRIPTION
       Uniq copies the input file, or the standard input, to the standard
       output, comparing adjacent lines.  In the normal case, the second and
       succeeding copies of repeated lines are removed.  Repeated lines must
       be adjacent in order to be found.

       -u     Print unique lines.

       -d     Print (one copy of) duplicated lines.

       -c     Prefix a repetition count and a tab to each output line.
              Implies -u and -d.

       -num   The first num fields together with any blanks before each are
              ignored.  A field is defined as a string of non-space, non-tab
              characters separated by tabs and spaces from its neighbors.

       +num   The first num characters are ignored.  Fields are skipped before
              characters.

SOURCE
       /src/cmd/uniq.c

SEE ALSO
       sort(1)

BUGS
       Field selection and comparison should be compatible with sort(1).



                                                                       UNIQ(1)