Install nmap if you don't already have it on your Linux computer. Run "sudo apt-get install nmap" on Ubuntu, or "sudo dnf install nmap" on Fedora. To investigate devices, try looking up OUIs, scanning ...

Nmap is an essential tool for anyone who's serious about network security. It can be installed on any Linux distribution.

I downloaded the nmap RPM (along wtih the frontend) on my RH 8.0 box. I can use nmap just fine from the shell but can't find out how to use the frontend anywhere (searched here, searched the FAQ). Umm ...