enabling setnu-mode on startup

[Tejas Kokje]

Hello,

I am using setnu.el script from
http://www.wonderworks.com/download/setnu.el.

I have edited my .emacs file and I am able to get line numbers on my
current buffer with  'M-x setnu-mode' . However, if I open a new
buffer, those line numbers don't show up there and I have to redo 'M-x
setnu-mode'.

What should I put in my .emacs file so that I have to do 'M-x
setnu-mode' only once for all buffers ? Also is there a way I can
enable setnu-mode on emacs startup so that I don't have to type in
every time I fire up emacs ?

Thanks

Tejas Kokje