🖥️ Node.js OS Module

Last Updated: 26th October 2025

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• The os module in Node.js provides operating system-related utility methods and properties.
• You can use it to get information about the system your Node.js app is running on.

Hinglish Tip 🗣: Socho os module ek “system info tool” hai jo bata sakta hai RAM, CPU, OS type aur username jaise details programmatically.

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✏ Importing OS Module

// CommonJS
const os = require("os");

// ES6 Module
import os from "os";

Common Methods & Properties

Method / Property	Purpose	Example	Output
os.arch()	CPU architecture	os.arch()	'x64'
os.platform()	Operating system platform	os.platform()	'win32', 'linux', 'darwin'
os.type()	OS name	os.type()	'Windows_NT', 'Linux', 'Darwin'
os.uptime()	System uptime in seconds	os.uptime()	56789
os.cpus()	CPU info	os.cpus()	Array of CPU cores
os.freemem()	Free memory in bytes	os.freemem()	234567890
os.totalmem()	Total system memory in bytes	os.totalmem()	17179869184
os.homedir()	Current user home directory	os.homedir()	'C:\Users\User'
os.hostname()	System hostname	os.hostname()	'DESKTOP-ABC123'
os.networkInterfaces()	Network interfaces info	os.networkInterfaces()	Object with interfaces

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💡 Quick Practice

• Print your OS platform, type, and architecture.
• Display the total and free memory.
• Log all network interfaces and hostname.
• Check how long the system has been running.

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