Nmap
>> Nmap ("Network Mapper") is a free and open source (license) utility for network discovery and security auditing.
>> Useful for tasks such as network inventory, managing service upgrade schedules, and monitoring host or service uptime.
>> nmap --version : Provided nmap version details if it is installed.
>> Nmap has traditionally been a command-line tool run from a Unix shell or (more recently) Windows command prompt.
>> Many graphical frontends have been created for those users who prefer a GUI interface. Nmap has traditionally included a simple GUI for Unix named NmapFE, but that was replaced in 2007 by Zenmap.
Installation via Source:
>> Download nmap source from http://nmap.org/dist/?C=M&O=D
>> Decompress the downloaded tarball.
>> Change into the newly created directory
>> ./configure
>> make
>> make instal
NMap Commands:
Scan a single host or an IP address:
nmap <IP/Hostname>
namp 192.168.0.2
nmap test1.com
Scan multiple IP address or subnet:
nmap <IP1> <IP2> <IP3>
OR
nmap 192.168.0.1,2,3
OR
nmap 192.168.0.1-15
OR
nmap 192.168.1.*
OR
nmap 192.168.1.0/24
Ref Url :
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