apt-cacher-ng software package provides caching proxy server for software repositories, you can install in your Ubuntu 16.04 LTS (Xenial Xerus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install apt-cacher-ng
apt-cacher-ng is installed in your system.
Make ensure the apt-cacher-ng package were installed using the commands given below,
$ sudo dpkg-query -l | grep apt-cacher-ng *
You will get with apt-cacher-ng package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Network |
| Package | apt-cacher-ng |
| Version | 0.9.1-1ubuntu1 |
| Description | caching proxy server for software repositories |
| Sub Section | Net |