Nmap is designed to allow the scanning of networks in order to determine which hosts are up and what services are they offering. Nmap supports a large number of scanning options, which are overkill for what will be done in this book.
sudo apt-get install nmap
Yes to install Nmap and its dependent packages.
After it is installed, run the following command to see all the hosts that are currently on the network:
nmap –T4 –F <your_local_ip_range>
your_local_ip_range is within the range of addresses assigned by your router.
Here's a node scan of my local network. If you have a lot of devices on your local network, this command may take a long time to complete.
Now, I know that I have more nodes on my network, but they don't show up. This is because...