Nmap stands for Network Mapper, it is a free and open-source network discovery and reconnaissance tool used for host discovery and collecting detailed information about a host. Written in C, C++ and Python and Initially released in September 1997, nmap has become an integral tool for cybersecurity and digital forensic professionals who rely on it to reveal detailed information about target hosts and unearth potential vulnerabilities. Nmap reveals information such as Active hosts on a network, open ports, OS and service detection, and performing stealth scans to mention just a few.
Learn nmap command in linux with 20 awesome examples. Nmap command is used to detect open ports, OS and service detection on remote host.