notify-send(1) on Linux
The text d860d9dc3d7a, as Debian 11 (Bullseye) shipped it.
a program to send desktop notifications
Flags it lists
-
--category -
--expire-time -
--help -
--hint -
--icon -
--urgency -
-? -
-c -
-h -
-i -
-t -
-u