ping6 -VERSION (return code: 0)
ping6 utility, iputils-s20121221
ping6 --help (return code: 2)
ping6: invalid option -- '-'
Usage: ping6 [-aAbBdDfhLnOqrRUvV] [-c count] [-i interval] [-I interface]
[-l preload] [-m mark] [-M pmtudisc_option]
[-N nodeinfo_option] [-p pattern] [-Q tclass] [-s packetsize]
[-S sndbuf] [-t ttl] [-T timestamp_option] [-w deadline]
[-W timeout] destination