"Nmap is a command line tool that rapidly scans a network
gathering information about machines and ports. It is easy to use
and flexible, making it perfect for the job of asset scanning. In
this tutorial you will see how to set up a system that will
regularly scan your network and create a report that can then be
used to keep inventory of your networked machines.
"Before we get to the actual scanning we need to install a
couple of applications. Since I am using a Ubuntu system,
we’ll run the installation using apt-get. With some simple
modifications, you can do the same on a fedora system. The two
applications to install are: nmap and ndiff. We use ndiff to
compare the results of scans. To install these applications open up
a terminal window and issue the following command:"