How to bind meta+shift in linux

[Ke Lu]

Hi

I see a ergonomic keybinding from 
http://xahlee.org/emacs/ergonomic_emacs_keybinding.html

But meta+shift+somekey takes no effect in linux.

ie
;; Move to beginning/ending of file
(global-set-key (kbd "M-J") 'beginning-of-buffer)  ; was nil
(global-set-key (kbd "M-L") 'end-of-buffer)  ; was nil

(global-set-key (kbd "M-S-j") 'beginning-of-buffer)  ; was nil
(global-set-key (kbd "M-S-l") 'end-of-buffer)  ; was nil

Both of them takes no effect.

Thanks.