code: def run_cmd(self, *args, **kwargs):
          
          timeout = kwargs.pop('timeout', None)
          p = self.raw_cmd(*args, **kwargs)
          return p.communicate(timeout=timeout)[0].decode('utf-8').replace('\r\n', '\n')
docs: Unix style output, already replace \r\n to \n
  
          Args:
              - timeout (float): timeout for a command exec