UNIQ(1) DOMAIN/IX Reference Manual (SYS5) UNIQ(1)
NAME
uniq - report repeated lines in a file
USAGE
uniq [ -udc [ -n ] [ +n ] ] [ input [ output ] ]
DESCRIPTION
Uniq reads the input file, and compares adjacent lines.
Normally, it removes the second and succeeding copies of
repeated lines, and writes the remainder on the output file.
Input and output should always be different. Note that
repeated lines must be adjacent to be found. See sort (1)
for further details.
Several options that you may use with uniq are described
below. In addition, you can specify n arguments to skip an
initial portion of each line in the comparison.
OPTIONS
-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 its neighbors by tabs and spaces. Fields are
skipped before characters.
+n Ignore the first n characters.
-u Output only those lines not repeated in the origi-
nal file.
-d Write a copy of only the repeated lines.
-c Supersede the -u and -d options and generate an
output report in default style, but with each line
preceded by a count of the number of times it
occurred.
RELATED INFORMATION
comm (1), sort (1).
Printed 6/10/85 UNIQ-1