Final answer:
This question asks for the correct syntax of the netcat tool on Linux. An example of proper syntax is 'nc -l -p 1234', which puts netcat in listen mode on port 1234.
Step-by-step explanation:
The subject of this question is the proper syntax for using the netcat tool on a Linux system. Netcat is a versatile networking utility which can be used for scripting, port scanning, transferring files, and network debugging. The proper syntax includes specifying the command 'nc' followed by various options such as host, port, and operation modes. An example of a correct syntax would be 'nc -l -p 1234' where '-l' stands for listen mode and '-p' specifies the listening port to 1234.