PHP - .sh wird nicht ausgeführt

if(isset($_POST['sdateien']))
   			 {
   				 if($_POST['ip'] == $cf['ip'][0])
   				 {
   					 $cmd = 'sudo -u samp /home/samp/createserver.sh '.$_POST['Version'].' '.$_POST['Port'].'';
   				 } else
   				 if($_POST['ip'] == $cf['ip'][1])
   				 {
   					 $cmd = 'sudo -u samp /home/samp/createserver2.sh '.$_POST['Version'].' '.$_POST['Port'].'';
   				 }
   				 $out = ServerCore::RunCommand($cmd, "proc");
   				 echo 'sdateien '.$cmd.' | '.$out.'';
   			 }

class ServerCore
{
    function RunCommand($cmd, $mode = '')
    {
   	 global $serverversion;


   	 if($serverversion == "win")
   	 {
   		 $cmdline = "cmd /C $cmd";
   		 if($mode == 'FG')
   		 {
   			 $outputfile = EXEC_TMP_DIR."\\".time().".txt";
   			 $cmdline .= " > $outputfile";
   			 $m = true;
   		 }
   		 else $m = false;
   		 $WshShell = new COM("WScript.Shell");
   		 $oExec = $WshShell->Run($cmdline, 0, $m);
   		 if($outputfile)
   		 {
   			 $retStr = file_get_contents($outputfile);
   			 unlink($outputfile);
   		 }
   		 else $retStr = "";
   		 return $retStr;
   	 }
   	 else
   	 {
   		 if($mode == 'FG') { exec($cmd, $output); }
   		 elseif($mode == 'proc') { @ob_clean; proc_close(proc_open($cmd, array(), $unused)); $output = @ob_get_contents(); }
   		 else { exec($cmd); $output = ""; }
   		 return $output;
   	 }
    }
}