@classmethod
def add_arguments(cls):
    """
        sub parser document
        """
    return [(('--skip-enable-services',), dict(action='store_true', help=
        'skip enable system services')), (('--skip-upload',), dict(action=
        'store_true', help='skip upload config files')), (('--skip-crontab'
        ,), dict(action='store_true', help='skip upload crontab')), ((
        '--skip-timezone',), dict(action='store_true', help=
        'skip set timezone')), (('--skip-hostname',), dict(action=
        'store_true', help='skip set hostname')), (('--skip-dns',), dict(
        action='store_true', help='skip config dns')), (('--enable-certbot'
        ,), dict(action='store_true', help='enable config ssl certificate')
        ), (('--reload',), dict(nargs='+', help='set reload service')), ((
        '--restart',), dict(nargs='+', help='set restart service')), ((
        '--start',), dict(nargs='+', help='set start service')), (('--stop'
        ,), dict(nargs='+', help='set stop service')), (('--parallel', '-P'
        ), dict(action='store_true', help=
        'default to parallel execution method'))]
