ubuntu-rebuild-a-source-package

# install deb build tools

sudo apt-get install build-essential fakeroot dpkg-dev devscripts

# download the source code

apt-get source package

# install other packages needed to build

sudo apt-get build-dep package
cd package

# update the version in the changelog

dch -i

# make any changes to the source
# e.g. vim debian/rules

# then build the new package

dpkg-buildpackage -rfakeroot -uc -b

#install the package

cd ..
sudo dpkg -i package.deb