uniq(1) on OpenBSD
The text a11d4d16ad36, as OpenBSD 3.2, OpenBSD 3.1, OpenBSD 3.0, OpenBSD 2.9, OpenBSD 2.8, OpenBSD 2.7 shipped it.
report or filter out repeated lines in a file
Flags it lists
-
-c -
-d -
-f -
-s -
-u