/usr/bin/ibacm: unrecognized option '--help'
usage: /usr/bin/ibacm
   [-D]             - run as a daemon (default)
   [-P]             - run as a standard process
   [-A addr_file]   - address configuration file
                      (default /etc/rdma/ibacm_addr.cfg)
   [-O option_file] - option configuration file
                      (default /etc/rdma/ibacm_opts.cfg)