.TH DDUP 1df "November 2016" "Manual page for ddup"
.SH NAME
.B ddup
\- remove duplicates from unsorted output
.SH USAGE
.B ddup
FILE1 [FILE2 ...]
.br
.B ddup
< FILE
.br
program |
.B ddup
.SH DESCRIPTION
.B ddup
removes duplicate lines from the input without requiring it to be sorted.
Because it caches each unique line, this is less efficient than using sort(1)
and then uniq(1), but necessary if maintaining the order is desirable.
.SH AUTHOR
Tom Ryder <tom@sanctum.geek.nz>