Adarsh Chakraborty adarsh-chakraborty

Here's a comprehensive Markdown guide you can save as postgres-application-user-setup.md.

PostgreSQL Production User Setup Guide

Overview

This guide explains how to securely configure PostgreSQL for production applications.

Instead of connecting your application using the postgres superuser, you'll create:

# Increase EC2 Storage Without Downtime (Ubuntu)

## 1. Increase EBS Volume Size

AWS Console → EC2 → Volumes → Select Volume → Actions → Modify Volume

Increase storage size (Example: 80GB → 250GB)

Wait until volume state becomes:

Facebook Lead Generation API Setup

This guide walks you through setting up Facebook Lead Generation API integration for your application.

Prerequisites

Facebook App with Lead Generation permissions
Page Admin access to the Facebook Page
App ID and App Secret from your Facebook App

Node.js Deployment

Steps to deploy a Node.js app to DigitalOcean using PM2, NGINX as a reverse proxy and an SSL from LetsEncrypt

1. Create Free AWS Account

Create free AWS Account at https://aws.amazon.com/

2. Create and Lauch an EC2 instance and SSH into machine

I would be creating a t2.medium ubuntu machine for this demo.

Create a file named rarreg.key in the Winrar Installation folder and the paste the following data

RAR registration data
WinRAR
Unlimited Company License
UID=4b914fb772c8376bf571
6412212250f5711ad072cf351cfa39e2851192daf8a362681bbb1d
cd48da1d14d995f0bbf960fce6cb5ffde62890079861be57638717
7131ced835ed65cc743d9777f2ea71a8e32c7e593cf66794343565

Source: https://askubuntu.com/questions/1075157/unable-to-set-my-screen-resolution-higher

Ubuntu or the other versions of it like (k,l,x,edu,etc.,) are required to add the resolution we want to set on some monitors.

So follow my steps:-

Open a Terminal by CTRL+ALT+T
Type xrandr and ENTER
Note the display name usually VGA-1 or HDMI-1 or DP-1

	const arr = [200, 1, 76, 13, 1231, 88, 13, 4, -2, 0, 11, 69];

	function bubbleSort(arr){
	let n = arr.length;
	for(let i=0;i<n-1;i++){
	for(let j=0;j<n-1-i;j++){
	if(arr[j] > arr[j+1]){
	// swap; put j into j+1
	// put j+1 in j
	let temp = arr[j];

	arr.__proto__ = object
	arr.prototype is same is arr.__proto__ which is a object.
	and each and every object in javascript has a prototype.

	that means arr.__proto__ also has a prototype

	arr.__proto__.__proto__ which is actually Object.prototype which is again an object

	arr.__proto__.__proto__.__proto__

	/*
	Write a function that takes two strings (a and b) as arguments. Return the number of times a occurs in b.

	Test Cases:

	myFunction('m', 'how many times does the character occur in this sentence?')
	Expected 2

	myFunction('h', 'how many times does the character occur in this sentence?')
	Expected 4

	let strs = ["abc" , "def", "ghi"];
	console.log(strs);
	let strs2 = strs.map(item => {
	return item.split('');
	});

	let transposed = transpose(strs2);