migration

gistfile1.txt

cp -r /etc/apt/preferences.d apt.preferences.d
cp /etc/apt/sources.list sources.list

update-alternatives --get-selections > alternatives.selection
dpkg --get-selections '*' > dpkg.selection
sudo debconf-get-selections > debconf.selection  (sudo apt-get install debconf-utils)

# copy *.selecttion to new system

dselect update
sudo debconf-set-selections < debconf.selection
sudo update-alternatives --set-selections < alternatives.selection
sudo dpkg --set-selections  < dpkg.selection
sudo apt-get -u dselect-upgrade    # or dselect install