    private function __simple_query($cmd)
    {
        if (!empty($this->__setup['resources'])) {
            if (is_array($this->__setup['resources'])) {
                foreach ($this->__setup['resources'] as $resource) {
                    $cmd .= " '" . $resource . "'";
                }
            } else {
                $cmd .= " '" . $this->__setup['resources'] . "'";
            }
        }
        return shell_exec($cmd);
    }