Node.js — OS

Import OS Module

const os = require('os');

Basic Information

os.platform()      // 'win32', 'darwin', 'linux'
os.arch()          // 'x64', 'arm64'
os.hostname()      // Computer name
os.type()          // 'Windows_NT', 'Darwin', 'Linux'
os.release()       // OS version
os.version()       // Kernel version

System Resources

// Total memory
os.totalmem()      // In bytes

// Free memory
os.freemem()       // In bytes

// CPUs
os.cpus()          // Array of CPU info

// Uptime
os.uptime()        // In seconds

Network Interfaces

const interfaces = os.networkInterfaces();
console.log(interfaces);

Home Directory

os.homedir()       // User home directory
os.tmpdir()        // Temporary directory

Practical Example

function getSystemInfo() {
    return {
        platform: os.platform(),
        arch: os.arch(),
        memory: {
            total: os.totalmem(),
            free: os.freemem()
        },
        cpus: os.cpus().length
    };
}

Mini Practice

1. Get system platform
2. Check available memory
3. Get CPU information
4. Find home directory

Up Next

Continue with URL — URL parsing and manipulation.