How to disable and enable keyboard in ubuntu?

I have a great trouble because I don't have enough space to put both `my keyboard` and `some other things` on my desk. And accidentally pressing some key may cause trouble to the system. So I am looking for one way to **lock my keyboard** temporarily. Of course I don't want to plug out the keyboard from the computer because it is so inconvenient. 

How can I do with this?

xinput -list

```
⎡ Virtual core pointer                          id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ Logitech USB Optical Mouse                id=9    [slave  pointer  (2)]
⎣ Virtual core keyboard                         id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
    ↳ Power Button                              id=6    [slave  keyboard (3)]
    ↳ Power Button                              id=7    [slave  keyboard (3)]
    ↳ CHICONY HP Basic USB Keyboard             id=8    [slave  keyboard (3)]
    ↳ HP WMI hotkeys                            id=10   [slave  keyboard (3)]

```