Intro
So we installed NodeJS on our machine.
Now we want to learn how to get information about the operating system by using the OS module.
Write a simple script
- Open your terminal
- Create a file named
index.js:
touch index.js
- Add this JavaScript code into it:
const { platform, arch, release, totalmem, freemem } = require('os');
console.log(`Your Operating System: ${release()} ${platform()} ${arch()}`);
console.log(`${((freemem() / totalmem()) * 100).toFixed(2)} % of your RAM is free.`);
Note: I use the most used url properties to decrease the complexity of this simple example. To see all the available properties, read the docs of the OS module. There is a lot of cool stuff.
Every line explained
/*
import the os module & destructure the desired properties/functions
similar to:
const os = require('os');
const { platform, arch, release, totalmem, freemem } = os;
*/
const { platform, arch, release, totalmem, freemem } = require('os');
// log some information about the operating system
console.log(`Your Operating System: ${release()} ${platform()} ${arch()}`);
// log some information about the memory (ram) (number is rounded to two decimals)
console.log(`${((freemem() / totalmem()) * 100).toFixed(2)} % of your RAM is free.`);
Run it from the terminal
- Run it:
node index.js
- Result:
Your Operating System: 5.2.9-arch1-1-ARCH linux x64
18.63 % of your RAM is free.
Further Reading
Questions
- Do you have an interesting idea, what we could create with this module?
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