turning on num lock on ubuntu start

open terminal and paste

sudo apt-get install numlockx

sudo cp /etc/X11/gdm/Init/Default /etc/X11/gdm/Init/Default_backup

gksudo gedit /etc/X11/gdm/Init/Default

then , add this code to above of the “exit 0” line that is placed end of the file…
          if [ -x /usr/bin/numlockx ]; then

            /usr/bin/numlockx on

        fi