Local repository

http://ubuntuguide.org/

sudo -i
apt-get install dpkg-dev
mkdir /var/www/apt
ln -s /var/cache/apt/archives /var/www/apt/binary
cd /var/www/apt
dpkg-scanpackages binary /dev/null | gzip -9c > binary/Packages.gz

each package upgrade
cd /var/www/apt
dpkg-scanpackages binary /dev/null | gzip -9c > binary/Packages.gz