First of all you can do a search in this forum.
However, I will let you know what you need to do.
chmod +x rc.cups
Since you have done a FULL install
. That means you have installed both lprng and cups printing system.
ls -l lp*
it will show that your lp -> lp-lprng, lpq -> lpq-lprng and so on. What you need to do is:
ln -s lp-cups lp
ln -s lpq-cups lpq
ln -s lpr-cups lpr
ln -s lprm-cups lprm
ln -s lpstat-cups lpstat