https://askubuntu.com/questions/224559/how-to-find-all-the-used-ip-addresses-on-a-network

sudo apt-get install nmap

nmap -sn 192.168.1.0/24

https://nmap.org/book/install.html

nmap --version

https://nmap.org/download.html

nmap -sn 192.168.0.1/24