When you build a list for scripting install's you properly end up with deb files in the list that isn't in the repository. This will kind of break the idea of rebuilding your machine automatically.
This howto will overcome this with some simple tricks.
We need dpkg-dev to make this work so install it like this:
sudo apt-get install dpkg-dev
Create a directory where you store the downloaded deb files:
Now make a script that will update the package list for apt-get:
cd ~/MyDebs dpkg-scanpackages . /dev/null | gzip -9c > Packages.gz
Save it as update-mydebs in your local bin directory and make executable:
gedit ~/bin/update-mydebs < paste in the above script lines save and close gedit chmod +x ~/bin/update-mydebs
To bind it all together put the following into /etc/apt/sources.list:
deb file:/home/domingo/MyDebs ./
After downloading a deb file run:
sudo update-mydebs sudo apt-get update
Now apt-get/Synaptic/aptitude can find/search/install/keep track of the deb files you download.