Do you need to find the IP address of a host on your network?
Here’s another tool for the job.
nmap runs on all major computer operating systems, and official
binary packages are available for Linux, Windows, and Mac OS X.
To Install on Debian and derivatives (e.g. Raspbian, Ubuntu, et al) execute:
sudo apt-get install nmap
Executing sudo nmap -sP <ip_address_range> returns a list that looks like this:
(It will take several seconds for nmap to complete the scan)
sudo nmap -sP 192.168.1.1-254
Starting Nmap 6.00 ( http://nmap.org ) at 2017-06-20 21:02 CDT
Nmap scan report for meter.box (192.168.1.15)
Host is up.
Nmap scan report for 192.168.1.80
Host is up (0.00045s latency).
MAC Address: B8:27:EB:5F:BA:84 (Raspberry Pi Foundation)
Nmap scan report for 192.168.1.100
Host is up (0.084s latency).
MAC Address: B8:27:EB:61:5F:FC (Raspberry Pi Foundation)
Nmap scan report for 192.168.1.105
Host is up (0.084s latency).
MAC Address: 00:18:39:81:5F:66 (Cisco-Linksys)
Nmap scan report for 192.168.1.150
Host is up (0.14s latency).
MAC Address: 00:18:39:81:5F:66 (Cisco-Linksys)
Nmap scan report for 192.168.1.222
Host is up (0.063s latency).
MAC Address: 00:18:39:81:5F:66 (Cisco-Linksys)
Nmap scan report for 192.168.1.228
Host is up (0.063s latency).
MAC Address: 00:18:39:81:5F:66 (Cisco-Linksys)
Nmap scan report for 192.168.1.229
Host is up (0.063s latency).
MAC Address: 98:E7:9A:18:32:EC (Foxconn(NanJing) Communication Co.)
Nmap done: 254 IP addresses (8 hosts up) scanned in 9.66 seconds
The address range you want scan is specified like this: 192.168.1.1-254
It’s simply a dash and an upper-limit-number appended to the IP address that you want the search to begin at.
Particularly helpful is the fact nmap reports each device’s MAC address, and is able to determine the manufacturer of the network interface. (the first three pairs of an ethernet network interface are a manufacturer ID)
Notice the .80 and .100 addresses are identified with the string Raspberry Pi Foundation.