diff --git a/front/maintenance.php b/front/maintenance.php
index 267f087d..b2c6fc9b 100644
--- a/front/maintenance.php
+++ b/front/maintenance.php
@@ -37,6 +37,10 @@
             id="btnDeleteMAC"   onclick="askDeleteDevicesWithEmptyMACs()">   Delete Devices with empty MACs </button>     
       </div>
    
+      <div class="pull-right">
+          <button type="button" class="btn btn-default pa-btn pa-btn-delete"  style="margin-left:0px;"
+            id="btnDeleteMAC"   onclick="askDeleteAllDevices()">   Delete All Devices </button>     
+      </div>
       <div class="pull-right">
           <button type="button" class="btn btn-default pa-btn pa-btn-create"  style="margin-left:0px;"
             id="btnDelete"   onclick="askRunScan1min()">   Run 1 min scan now</button>     
diff --git a/front/php/server/devices.php b/front/php/server/devices.php
index f88f950b..bc005a5e 100644
--- a/front/php/server/devices.php
+++ b/front/php/server/devices.php
@@ -259,11 +259,13 @@ function createBackupDB() {
   //   echo "Error copying DB. SSH into instance and copy manually.";
   // }
 
-  $command = escapeshellcmd('/home/pi/pialert/back/maintenance.py backup_DB');
-  $output = shell_exec($command);
+  $mystring = system('python /home/pi/pialert/back/maintenance.py backup_DB', $retval);
+  // $command = escapeshellcmd('/home/pi/pialert/back/maintenance.py backup_DB');
+  // $output = shell_exec($command);
 
 
-  echo $output;
+  //echo $output;
+  echo $retval;
 }
 
 //------------------------------------------------------------------------------