Command line open-source network and security scanning tool Nmap ("Network Mapper") is a free and open source utility for network exploration or security auditing. Many systems and network administrators also find it useful for tasks such as network inventory, managing service upgrade schedules, and monitoring host or service uptime. This package contains the command-line only nmap, ncat, ndiff, and nping. Most functions work without root privileges, while some (like OS fingerprinting) do require them. If you use an option that does require root privileges without using sudo, you will be notified that it requires them.