10.0;dldupl (delete_duplicate_lines), revision 1.0, 88/01/21
dldupl (delete_duplicate_lines) -- Strip repeated lines from a file.
usage: dldupl [-c] [pathname ...]
DESCRIPTION
dldupl reads the input file(s), comparing adjacent lines. Second and
succeeding copies of repeated lines are removed; the remaining lines are
written to standard output.
ARGUMENTS
pathname (optional)
Specify input file. Multiple filenames permitted; separate names
with blanks.
Default if omitted: read standard input
OPTIONS
-c Write number of occurrences of each line to standard output.
EXAMPLES
Suppose you have two alphabetized dictionary files. To create one
dictionary file containing the words from both, use:
$ srf -m dict1 dict2 | dldupl >dict.new
This merges the words from the two files (srf -m), then deletes any
duplicate words and saves the result in the new dictionary.