UNIQ(1) GENIX Programmer's Manual 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. In the normal
case, the second and succeeding copies of repeated lines are
removed; the remainder is written on the output file. Note that
repeated lines must be adjacent in order to be found; see sort(1).
If the -u flag is used, just the lines that are not repeated in the
original file are output. The -d option specifies that one copy of
just the repeated lines is to be written. The normal mode output is
the union of the -u and -d mode outputs.
The -c option supersedes -u and -d and generates an output report in
default style but with each line preceded by a count of the number
of times it occurred.
The n arguments specify skipping an initial portion of each line in
the comparison:
-n The first n 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 neigh-
bors.
+n The first n characters are ignored. Fields are skipped
before characters.
SEE ALSO
sort(1), comm(1)
Printed 11/16/83 1