ifupdown software package provides high level tools to configure network interfaces, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install ifupdown
ifupdown is installed in your system.
Make ensure the ifupdown package were installed using the commands given below,
$ sudo dpkg-query -l | grep ifupdown *
You will get with ifupdown package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Administration Utilities |
| Package | ifupdown |
| Version | 0.7.47.2ubuntu4 |
| Description | high level tools to configure network interfaces |
| Sub Section | Admin |