def validate_opts(opts, brokers_num):
    """Basic option validation. Returns True if the options are not valid,
    False otherwise.

    :param opts: the command line options
    :type opts: map
    :param brokers_num: the number of brokers
    :type brokers_num: integer
    :returns: bool
    """
    if opts.skip < 0 or opts.skip >= brokers_num:
        print('Error: --skip must be >= 0 and < #brokers')
        return True
    if opts.check_count < 0:
        print('Error: --check-count must be >= 0')
        return True
    if opts.unhealthy_time_limit < 0:
        print('Error: --unhealthy-time-limit must be >= 0')
        return True
    if opts.check_count == 0:
        print('Warning: no check will be performed')
    if opts.check_interval < 0:
        print('Error: --check-interval must be >= 0')
        return True
    return False
