diff --git a/src/shell/lisa_shell b/src/shell/lisa_shell
old mode 100644
new mode 100755
index 598d423c052382fecab6c25b22e55246edbfe87d..4cf6451ffdfbb99d59fd4cd285e6a58df4f2fa60
--- a/src/shell/lisa_shell
+++ b/src/shell/lisa_shell
@@ -113,11 +113,12 @@ echo
 ################################################################################
 
 function _lisa-ipython-usage {
-    echo "Usage: lisa-ipython CMD [NETIF]"
+    echo "Usage: lisa-ipython CMD [NETIF [PORT]]"
 	echo " CMD     - IPython Notebooks command (deafult: start)"
 	echo "  start  start the ipython server"
 	echo "   stop  stop the ipython server"
     echo " NETIF   - the network interface to start the server on (default: lo)"
+    echo " PORT    - the tcp port for the server (default: 8888)"
 }
 
 function _lisa-ipython-start {