How to disable page forward/backward key in Thinkpad

It's a design flaw for Thinkpad to put page forward/backward together with the arrow keys. This frequently leads to loss of unpublished posts. This is what you can do in Ubuntu to disable those two keys:

1. Create the file ~/.Xmodmap with the following contents

   keycode 166=
   keycode 167=
   

2. (Depending on your distribution, this step may not be necessary.) Add the following code to your ~/.profile

   # keyboard modifier
   if [ -f $HOME/.Xmodmap ]; then
       /usr/bin/xmodmap $HOME/.Xmodmap
   fi