this laptop is old and my both shift keys and the caps lock key are no longer working. all the other keys are however still working. i dont know what caused this. maybe it is the layout problem or the keyboard circuit is broken. i have tried https://superuser.com/questions/248517/show-keys-pressed-in-linux to see if pressing the keys shows up something. but on pressing shift and caps lock keys, nothing happens.
can i map some other key on the keyboard like say that option-menu key with three horizontal bars to work as my shift. i see so many miscellaneous keys on my keyboard that i dont use, can i use anyone of them for shift keys.