Install Nmap in Linux Ubuntu

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Install Nmap in Linux Ubuntu
if you have previously described how to install Metasploit framework in linux ubuntu, this time I will explain how to install nmap on ubuntu linux. What is nmap?

Nmap ("Network Mapper") is a open source tool for network exploration and security auditing. It was designed to examine a large network quickly, although it may also work against single hosts. Nmap uses raw IP packets in a sophisticated way to determine which hosts are available on the network, the services (application name and version) of what is given, the operating system (and version) is being used, what kind of firewall / packet filter is used, and a number of other characteristics. Although Nmap is commonly used for security audits, but many system and network administrators consider it useful for routine tasks such as network inventory, managing service upgrade schedules, and monitoring host or service uptime.

The first step is to install Nmap:
into the terminal / console and login as root
$ sudo -i
$ su
after logging into root, type the following command to download and install nmap:
$ apt-get install nmap
to download and install nmap

if we're going to start scanning, the command used is:
$ nmap -v -A
$ nmap -v -sP
$ nmap -v -iR 10000 -PN -p 80


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