echoping(1) on Linux
The text a1e7c0db3f59, as Debian 3.0 (Woody) shipped it.
tests a remote host with TCP or UDP
Flags it lists
-
-A -
-C -
-P -
-S -
-a -
-c -
-d -
-f -
-h -
-i -
-n -
-p -
-r -
-s -
-t -
-u -
-v -
-w