icmpinfo(1) on Linux
The text 2e0081d7a0b8, as Debian 1.3 (Bo), Debian 1.2 (Rex), Debian 1.1 (Buzz) shipped it.
interpret ICMP messages
Flags it lists
-
-k -
-l -
-n -
-p -
-s -
-v -
-vv -
-vvv