/usr/bin/udaddy: invalid option -- '-' usage: /usr/bin/udaddy [-s server_address] [-b bind_address] [-f address_format] name, ip, ipv6, or gid [-P port_space] udp or ipoib [-c connections] [-C message_count] [-S message_size] [-t type_of_service] [-p port_space - 0x111 for UDP (default), 0x2 for IPOIB]