Network

The nmap command

Scans hosts and ports to discover which services are exposed. A basic auditing tool.

Syntax

nmap [opciones] host

Most useful options

-pScans only the given ports
-sVDetects service versions
-AAggressive detection (OS, scripts)

Copy-ready examples

$ nmap localhostOpen ports on your machine

You can try them in the browser terminal: it does not touch your computer.

Typical mistakes

  • Scanning networks that are not yours can be illegal without authorisation.

Related commands

ncsslsof

FAQ

What is it for in real work?

To inventory services, check firewalls and authorised security audits.

Learn to actually use it

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