function crontab_set($min,$hour,$monthDay,$monthNum,$weekDay, $app){ 
    $command = "$min $hour $monthDay $monthNum $weekDay $app"; 
    $command = trim($command);
	//echo $command;
    $cron_file = ROOT_PATH."/files/cron/cron";
	    if (file_exists($cron_file) && is_writeable($cron_file)){ 
			$open = fopen($cron_file,"w"); 
			fwrite($open,$command."\r\n");
			fclose($open);
			//$a = exec("sudo /usr/local/bin/php -q /usr/local/apache2/htdocs/cronCLI.php");
			$a = shell_exec("/usr/bin/crontab -u nobody".$cron_file);
			echo $a;
		} else { 
			touch($cron_file); 
			chmod($cron_file, 0777); 
			$open = fopen($cron_file, "w");
			fwrite($open, $command."\r\n");
			fclose($open);
			//$a = exec("/usr/local/bin/php -q /usr/local/apache2/htdocs/cronCLI.php");
			$a = shell_exec("/usr/bin/crontab -u nobody ".$cron_file);
			echo $a;
		}
}