This question already has an answer here:
I'm currently using precise. I need to upgrade a certain package (namely bind9 and it's dependencies) to a newer version, which is currently found in raring (alfa at the time of writing this). How to do it ?
What will happen if I just add to my sources.list:
deb http://archive.ubuntu.com/ubuntu raring main
Will the next
apt-get update / apt-get upgrade, upgrade most of my system to raring then ?