echoping(1) on Linux
The text 2b8d2034758f, as Debian 2.2 (Potato), Debian 2.1 (Slink) shipped it.
tests a remote host with TCP or UDP
Flags it lists
-
-c -
-d -
-f -
-h -
-i -
-n -
-r -
-s -
-t -
-u -
-v -
-w