cd dev/packaging/
mkdir battleball
cd battleball
mkdir cur
cd cur
dget -x https://edge.launchpad.net/ubuntu/intrepid/+source/battleball/2.0-16.1ubuntu1/+files/battleball_2.0-16.1ubuntu1.dsc
cd ..
dget -x http://ftp.debian.org/debian/pool/main/b/battleball/battleball_2.0-17.dsc
ls
cd cur/
dch -i
cd ..
ls
cd battleball-2.0/
dch -i
update-maintainer 
debuild -S
cd ..
ls
sbuild -d intrepid-i386 battleball_2.0-17ubuntu1.dsc 
debdiff battleball_2.0-17.dsc battleball_2.0-17ubuntu1.dsc | diffstat
debdiff battleball_2.0-17.dsc battleball_2.0-17ubuntu1.dsc > debian-ubutu.debdiff
debdiff cur/battleball_2.0-16.1ubuntu1.dsc battleball_2.0-17ubuntu1.dsc | diffstat 
debdiff cur/battleball_2.0-16.1ubuntu1.dsc battleball_2.0-17ubuntu1.dsc > ubuntu-ubuntu.debdiff