$ monmaptool --help
  usage: monmaptool [--print] [--create [--clobber] [--fsid uuid]]
          [--enable-all-features]
          [--generate] [--set-initial-members]
          [--add name 1.2.3.4:567] [--rm name]
          [--feature-list [plain|parseable]]
          [--feature-set <value> [--optional|--persistent]]
          [--feature-unset <value> [--optional|--persistent]]
          [--set-min-mon-release <release-major-number>]
          <mapfilename>