If you have a device that is on the same network but not responding to any requests such as ping, HTTP, HTTPS etc…
apt-get install arp-scan
arp-scan --interface=eth0 --localnet
Here, –interface=eth0 represents the interface to use for scanning, and –localnet makes arp-scan scan all possible IP addresses on the network. You can omit the –interface option, in which case arp-scan will search the system interface list for the lowest numbered, configured up interface.