<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:

def _old_run_cmd(self, cmd):
        '''
        Cleanly execute the command string
        '''
        try:
            proc = subprocess.Popen(
                cmd,
                shell=True,
                stderr=subprocess.PIPE,
                stdout=subprocess.PIPE,
            )

            data = proc.communicate()
            return data[0], data[1], proc.returncode
        except Exception:
            return ('local', 'Unknown Error', None)