NMAP

Scanns networks.

Installation

sudo apt-get update
sudo apt-get install nmap

Basics

Example	Description
nmap 192.168.1.1	Scan a single IP
nmap 192.168.1.1 192.168.2.1	Scan specific IPs
nmap 192.168.1.1-254	Scan a range
nmap scanme.nmap.org	Scan a domain
nmap 192.168.1.0/24	Scan using CIDR notation
nmap -iL targets.txt	Scan targets from a file
nmap -iR 100	Scan 100 random hosts
nmap --exclude 192.168.1.1	Exclude listed hosts

Port Scanning

Example	Description
nmap 192.168.1.1 -p 21	Port scan for port x
nmap 192.168.1.1 -p 21-100	Port range
nmap 192.168.1.1 -p U:53,T:21-25,80	Port scan multiple TCP and UDP ports
nmap 192.168.1.1 -p-	Port scan all ports
nmap 192.168.1.1 -F	Fast port scan (100 ports)
nmap 192.168.1.1 -p http,https	Port scan from service name
nmap 192.168.1.1 --top-ports 2000	Port scan the top x ports

-O nmap 192.168.1.1 -O 

Performance

nmap 192.168.1.1 -T0  # Paranoid
nmap 192.168.1.1 -T1  # Sneaky
nmap 192.168.1.1 -T5  # Insane

Other

nmap -6 2607:f0d0:1002:51::4 Scanns for IPv6

Example	Description
nmap 192.168.1.1 -oN normal.file	Normal output to the file normal.file
nmap 192.168.1.1 -oX xml.file	XML output to the file xml.file
nmap 192.168.1.1 -oG grep.file	Grepable output to the file grep.file