nms:tldr:775d0

This command is a pipeline command that consists of two parts: "echo" and "nms". Let's break it down:

1. echo: The "echo" command is a basic command in Unix-like systems that is used to display messages or text on the terminal. In this specific case, it is used to display the content inside the quotes "${Hello, World!}".

2. "${Hello, World!}": The quotes "${Hello, World!}" represent a string of characters. The use of "${}" is typically associated with variable substitution, where the contents inside the curly braces represent a variable. However, in this case, it is simply a string literal representing the text "Hello, World!".

3. | (Pipe): The pipe symbol "|" is used to connect the output of one command (echo in this case) to the input of another command (nms, in this case). It allows the output of the command on the left side of the pipe to become the input to the command on the right side.

4. nms: The "nms" command is not a standard Unix command, so its functionality and purpose cannot be determined without more information. It might be a custom or third-party command specific to the system or it might produce an error if it is not recognized.

In summary, this command will display the message "Hello, World!" using the "echo" command, and then attempt to pass that output to a command named "nms" for further processing.