Description : Nmap is a tool used for determining the hosts that are running and what services the hosts are running. Nmap can be a valuable diagnostic tool for network administrators
Once the network is charted out using tools like Lan MapShot, the Nmap can be used to determine the type of services and hosts running in the network.

Uses of Nmap

1. Determining open ports and services running in an host
2. Determine the Operating System running on a host
3. Alter the source IP of the scan

nmap commands
-sS syn scan instead of a tcp scan
-O OS

examples how to run nmap

nmap -sS -O xxx.xxx.xxx.xxx ( x means ip or you can give hostname)