Update README

README

@@ -37,7 +37,12 @@ C:\vms\ubuntu-12.04.vbox
 C:\vms\ubuntu-12.04.vmdk.vmdk
 C:\vms\ubuntu-12.04.vmdk-flat.vmdk
 ---
-If you installed VirtualBox soft, then the last step is: double clik file "ubuntu-12.04.vbox" and run ubuntu 12.04 in VirtualBox. 
+If you installed VirtualBox soft, then the last step is: double clik file "ubuntu-12.04.vbox" and run ubuntu 12.04 in VirtualBox.
+In ubuntu 12.04 login Interface:
+username: chy
+password: <SPACE KEY>
+
+After you login, you will see the directory ucore_lab in HOME directory.
 
 EXERCISE STEPS
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