arpalert software package provides monitor ARP changes in ethernet networks, 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 arpalert
arpalert is installed in your system.
Make ensure the arpalert package were installed using the commands given below,
$ sudo dpkg-query -l | grep arpalert *
You will get with arpalert package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Network |
| Package | arpalert |
| Version | 2.0.12-1 |
| Description | monitor ARP changes in ethernet networks |
| Sub Section | Net |