diff --git a/doc/tutorials/using_ubuntu_as_sos.rst b/doc/tutorials/using_ubuntu_as_sos.rst
index 4b4de845e..3a4ed992d 100644
--- a/doc/tutorials/using_ubuntu_as_sos.rst
+++ b/doc/tutorials/using_ubuntu_as_sos.rst
@@ -152,7 +152,6 @@ the source code, build it, and install it on your device.
          
         sudo efibootmgr -o xxx,xxx,xxx 
 
-
    .. note::
       By default, the “ACRN Hypervisor” you have just added should be
       the first one to boot. Verify this by using ``efibootmgr -v`` or