code: def execute(self, name, command):
          
          if name in ["localhost"]:
              r = '\n'.join(Shell.sh("-c", command).split()[-1:])
          else:
              r = '\n'.join(Shell.ssh(name, command).split()[-1:])
          return r
docs: execute the command on the named host
          :param name: the name of the host in config
          :param command: the command to be executed
          :return: