What are Nmap's basic commands?

Here are some basic Nmap commands that you can use for network scanning:

1. Basic Host Discovery:

   nmap <target>

   This command scans the specified target (IP address or hostname) to discover open ports.

2. Scan Specific Ports:

   nmap -p <port1,port2,...> <target>

   This command scans specific ports on the target. For example, to scan ports 80 and 443:

   nmap -p 80,443 <target>

3. Operating System Detection:

   nmap -O <target>

   This command enables OS detection to identify the operating system of the target.

4. Service Version Detection:

   nmap -sV <target>

   This command detects the versions of services running on open ports.

5. Aggressive Scan:

   nmap -A <target>

   This command performs an aggressive scan, which includes OS detection, version detection, script scanning, and traceroute.

6. Scan a Range of IPs:

   nmap <start_ip>-<end_ip>

   This command scans a range of IP addresses. For example:

   nmap 192.168.1.1-10

7. Save Output to a File:

   nmap -oN <filename> <target>

   This command saves the scan results to a specified file. For example:

   nmap -oN scan_results.txt <target>

These commands provide a foundation for using Nmap effectively in network reconnaissance and security assessments.