Information Gathering
Linux host discovery with Nmap
For auditing purposes we can perform Linux host discovery with the famous Nmap tool.
Summary
Not everyone has the budget to buy an expensive software suite to do host discovery on the network. Fortunately there are some great open source alternatives. By combining the right tools we can discover hosts and filter the ones we are looking for. In this article we have the goal to determine what systems on our network are running Linux. Of course it is easy to swap out some pieces in the examples to do the same for Windows, Mac OS or BSDs.