nc.traditional (Netcat traditional)
The manual page and help for the nc.traditional Linux command. netcat is a simple unix utility that reads and writes data over network connections using the TCP or UDP protocol. It is designed to be a reliable "backend" tool that can be used directly or easily controlled by other programs and scripts. At the same time, it is also a feature-rich network troubleshooting and discovery tool, as it can create almost any connection you might need and has many interesting built-in capabilities.