Netcat

Netcat is a lightweight command-line networking utility used for reading and writing data across TCP and UDP connections. Often called the “Swiss Army knife” of networking, it enables users to quickly test, debug, and interact with network services, making it a valuable tool for system administrators, developers, and DevOps engineers.

Features of Netcat:

• Supports TCP and UDP communication for flexible network operations.
• Can act as both a client and a server using listen mode.
• Useful for port scanning and service availability testing.
• Enables simple file transfers between systems.
• Supports proxy connections and tunneling.
• Includes TLS support in modern implementations (OpenBSD version).

Netcat Usage Instructions:

$ sudo su
$ cd src/usr.bin
$  nc-1.237 -V

Disclaimer: Netcat is an open-source networking utility available under permissive licenses depending on the implementation. It is widely used for legitimate network testing and debugging purposes. The software is provided "as is" without any warranties. Users are responsible for ensuring proper and ethical use in compliance with applicable laws and organizational policies.