echoping(1) on Linux
The text 6854f427865c, as Debian 4.0 (Etch), Debian 3.1 (Sarge) shipped it.
tests a remote host with TCP or UDP
Flags it lists
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-4 -
-6 -
-A -
-C -
-P -
-S -
-a -
-c -
-d -
-f -
-h -
-i -
-n -
-p -
-r -
-s -
-t -
-u -
-v -
-w