How to use Ubuntu nmap for network scanning?

@gaston 

Nmap is a popular network scanner that can be used to discover hosts and services on a computer network, thus creating a map of the network. Here are the steps to use nmap on Ubuntu:

1. Open a terminal on your Ubuntu machine.
2. Install nmap if it is not already installed by typing the following command:sudo apt-get install nmap
3. Type the following command to scan a target IP address or hostname:sudo nmap [target] Replace [target] with the IP address or hostname you want to scan.
4. You can also specify a range of IP addresses to scan by using the following command:sudo nmap [starting IP]-[ending IP]
5. Nmap has many options that you can use to customize your scan. For example, you can use the -sS option to perform a TCP SYN scan, which can be faster and more stealthy. To use this option, type the following command:sudo nmap -sS [target]
6. You can also save the output of your scan to a file using the -oN option. To do this, type the following command:sudo nmap -oN [filename] [target] Replace [filename] with the name of the file you want to save the output to.

These are some basic commands to get started with nmap on Ubuntu. For more advanced usage, you can refer to the nmap manual by typing the following command:

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man nmap