In Node.js, you can read environment variables using the process.env object. This object provides access to all environment variables that are set when the Node.js process was started.

In Node.js, you can write data to files using the built-in fs module. fs.writeFile() function is used to writing a file asynchronously. fs.writeFileSync() function is used to writing a file synchronously.

To exit a Node.js application, you can use the process.exit() method. This method takes an optional exit code as a parameter and terminates the Node.js process.

​An equivalent of the 'which' command on the Windows command line is 'where' and it serves the same purpose as 'which' on Unix-like systems.

When an application is run through the command-line interface (CLI) of an operating system, the Command-line arguments are used to pass additional information to a program . In Node.js, all command-line arguments received by the shell are given to the process in an array called argv(arguments-values)&pe

gRPC is a high-performance open-source framework for remote procedure calls (RPCs). It uses Protocol Buffers, a language-agnostic data serialization format, and provides support for various programming languages and platforms, including Node.js.

Sometimes Node.Js struggle with serving static content such as images and Javascript files and load balancing across multiple server. Using Nginx as a reverse proxy for a Node.js server can improve performance, scalability, security, and manageability of your application.