Nmap (Network Mapper) is a security scanner. It is used to discover hosts and services on a computer network.
This video will walk you through step-by-step another performing an Nmap Scan with NetHunter.
The Nmap Scan on NetHunter you'll find is very simple to use, the features we will be using this video Will be, Service / version detection, enable OS detection in the top 20 ports.

First let me explain the service version detection, the service version detection Will List the services that are running in their versions, later on we can use some research on these services the find out there's a vulnerability for the service version.

As for the enable OS detection, this feature tries guessing the version of the operating system that is running it's not always as accurate so don't always count on this.

The top 20 ports, we'll give you an output of the top 20 ports that are running on the machine and sure you have they're closed.

If you're curious to know what we're using this video, we are running Kali Linux net Hunter, on a Nexus 6 phone.
Be sure to check out the video, on how to install Kali Linux on a Nexus 6 if you're planning to install Kali Linux NetHunter on a Nexus 6 or Nexus 6p.

Information Gathering, Training