FROM SERVER ONLINE :
mkdir /home/system/apt
cp /var/cache/apt/archives/*.deb /home/system/apt/
dpkg-scanpackages /home/system/apt /dev/null | gzip -c9 > /home/system/apt/Packages.gz
TO SERVER OFFLINE :
echo "deb [trusted=yes] file:/home/system/apt ./" > /tmp/apt.list
sudo mv /tmp/apt.list /etc/apt/sources.list.d/apt.list
#sudo cp apt/* /var/cache/apt/archives/
sudo apt-get update
sudo apt install telo