How to detect the OS of a remote System

Detecting OS (operating system) is another most important step towards hacking into a system. We can even say that after tracing the IP of the system it is the most prior thing that should be done to get the root on a system cause without having knowledge about the OS running by the target system you cannot execute any system commands on the target system and thus your mission wont be accomplished.

So what is the easiest way of detecting the OS of the system? Well there are many Ways to do it but the easiest is Downloading the Nmap from its site www.insecure.org .

And then using it’s command

Nmap –O <ip address>

To find the Os of the Remote Machine.