Bash Script to track changes of Mac adresses and IP adresses in your network

With This Script you can track the changes in your IP adresses and mac adresses within your own network. And you can add consequences when there are too many changes. In my case, a Virtualmachine will be shut down.

Every virtual machine that is running, runs under a specific user name, the script checks wich Virtual Machines are running under the username and then shuts it down.