ifupdown2 software package provides Network Interface Management tool similar to ifupdown, 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 ifupdown2
ifupdown2 is installed in your system.
Make ensure the ifupdown2 package were installed using the commands given below,
$ sudo dpkg-query -l | grep ifupdown2 *
You will get with ifupdown2 package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Administration Utilities |
| Package | ifupdown2 |
| Version | 1.0~git20151029-1 |
| Description | Network Interface Management tool similar to ifupdown |
| Sub Section | admin |