plan9 man page for 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 charac-
	      ters separated by tabs and spaces from its neighbors.

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

SOURCE
       /sys/src/cmd/uniq.c

SEE ALSO
       sort(1)

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

																	   UNIQ(1)