Linux Command: nmap
Network exploration and security auditing — port scanning and service detection
Terminal — Networking
Command
$
nmap -sV -p 22,80,443 --open dargslan.com
Output
PORT STATE SERVICE VERSION
22/tcp open ssh OpenSSH 9.2p1 Debian
80/tcp open http nginx 1.24.0
443/tcp open ssl/http nginx 1.24.0
nmap is the de facto network scanner. -sV detects service versions, -sC runs default scripts, -A enables OS detection + traceroute. Always scan responsibly — only against systems you own or have explicit permission to test.