aria2 is by far the best download accelerator for Linux, now you can enjoy the acceleration power of this multi-threaded downloaded utility for your apt-get package installations and upgrades.apt-fast is a shellscript wrapper to apt-get/aptitude which utilizes the more efficient and powerful aria2 download accelerator to fetch binaries from multiple mirrors with multiple connections in parallel per package resulting in drastically improved download times.

You can install apt-fast on Ubuntu using the below commands or follow the instructions at Github repo for other Linux distro's:

sudo add-apt-repository ppa:apt-fast/stable
sudo apt-get update
sudo apt-get install apt-fast

To use you simply need to use apt-fast instead of apt-get, for example apt-fast upgrade, apt-fast install packagename etc..