Nmap - network mapper used to query hosts on a network looking for open ports/services  syntax sudo nmap -F 192.168.1.154

Nmap (Network Mapper) is a popular open-source tool used for network discovery and security auditing. It allows users to scan networks and gather information about hosts and services, including open ports, running services, operating systems, and more.

Common Uses of Nmap:

1. Host Discovery: Identifies live hosts on a network.
2. Port Scanning: Determines which ports are open on a host.
3. Service Version Detection: Identifies the versions of services running on open ports.
4. OS Detection: Tries to determine the operating system of a host.
5. Vulnerability Scanning: Can detect known vulnerabilities with Nmap scripts.
6. Network Inventory: Used to audit and map out network devices.

Key Nmap Options:

• p: Specify ports (e.g., -p 80 or -p 80,443).
• sS: Perform a TCP SYN scan (stealth scan).
• sT: Perform a TCP connect scan (full TCP connection).
• sU: Perform a UDP scan.
• sV: Service version detection.
• O: Enable OS detection.
• A: Enable OS detection, version detection, script scanning, and traceroute.
• sn: Ping scan (only determines if hosts are up).
• v: Enable verbose output.
• -script: Run a specific Nmap script (NSE).