I am on my Ubuntu 18.04 desktop and looking for a GUI tool to list all active IP addresses on my local network. In Windows, I can use wnetwatcher or many other applications that can be used to scan the IP address and provide some additional information. But in Linux, the options are a bit limited. One of my favorite IP scanner application is Angry IP Scanner. This software is capable to scan IP address and port in any ranges. It also comes with a simple user interface.
Angry IP Scanner provides a fast and easy way to scan IP address and ports on your network. It also provides some additional information such as hostname, ping speed. With this tool, you will see which IP addresses are active. Angry IP Scanner is available for Windows, Mac and also Linux. This could be the best alternative to wnetwatcher for Linux.
Download Angry IP Scanner 3.5.3