uniq(1) on OpenBSD
The text 21ec1e4b5fae, as OpenBSD 7.0, OpenBSD 6.9, OpenBSD 6.8, OpenBSD 6.7, OpenBSD 6.6, OpenBSD 6.5, OpenBSD 6.4, OpenBSD 6.3 shipped it.
report or filter out repeated lines in a file
Flags it lists
-
-c -
-d -
-f -
-i -
-s -
-u