Netcat or nc networking utility

 

What is netcat?

Wiki ans:

netcat (often abbreviated to nc) is a computer networking utility for reading from and writing to network connections using TCP or UDP. The command is designed to be a dependable back-end that can be used directly or easily driven by other programs and scripts. At the same time, it is a feature-rich network debugging and investigation tool, since it can produce almost any kind of connection its user could need and has a number of built-in capabilities.

What are the function nc?

Function: Arbitrary TCP and UDP connections and listens

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How to use?

Syntax: nc [-46cDdFhklNnrStUuvz] [-C certfile]

 [-e name] [-H hash] [-I length] [-i interval] [-K 

keyfile] [-M ttl] [-m minttl] [-O length]

 [-o staplefile]

 [-P proxy_username] 

[-p source_port] [-R CAfile] [-s source] 

[-T keyword] [-V rtable] [-w timeout]

 [-X proxy_protocol] 

[-x proxy_address[:port]] 

[destination] [port]

Example: nc -p 31337 -w 5 host.example.com 

42

Linux have Netcat?

Netcat is cross-platform, and

it is available for Linux, macOS, Windows, and

BSD. You can use Netcat to debug and monitor

network connections, scan for open ports,

transfer data, as a proxy, and more. The Netcat

package is pre-installed on macOS and popular

Linux distributions like Ubuntu, Debian or

CentOS.

What nc do in linux?

Netcat functions as a back-end tool that allows

for port scanning and port listening.

. In addition, you can actually transfer files

directly through Netcat or use it as a backdoor

into other networked systems.