nmap -A aggressive

nmap -A -T4 <target>

Aggressive nmap scan combining OS detection, version detection, scripts, and traceroute.

When you need all possible information from a host in the shortest time, and stealth is not a concern. -A enables OS detection (-O), version detection (-sV), default scripts (-sC), and traceroute. In a fully authorized red team engagement, this gives you the complete picture.

It is extremely noisy and leaves traces in logs. Never use it in stealthy reconnaissance phases or on networks with modern IDS/IPS. Prefer staged scans if you need the same information without alerting.