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# Linux Swap Configuration Guide for EC2 Instances

## What is Swap?

**Swap** is disk space that the Linux kernel uses as virtual memory when physical RAM is full. Think of it as an overflow area for memory.

**How it works:**
1. When RAM fills up, Linux moves rarely-used memory pages to swap
2. Frees up RAM for active processes
3. If a swapped-out page is needed, Linux reads it back from disk (slow but prevents crashes)

**Trade-off:** Swap is 100-1000x slower than RAM, but prevents

# NotebookLM - Questions Pièges & Réponses pour Présentation Finance

## 🔒 SÉCURITÉ & CONFIDENTIALITÉ

### Q1 : "Si on met des données sensibles dans NotebookLM, sont-elles utilisées pour entraîner l'IA ?"

**Réponse courte :**
Cela dépend de la version utilisée.

**Réponse détaillée :**

| Version | Training IA | Revue humaine | Verdict |
|---------|-------------|---------------|---------|
| **Free** | ❌ Non | ⚠️ Si feedback donné | ❌ Proscrire pour données sensibles |
| **Plus** 

# Templates NotebookLM - Audio/Video Overviews

## Structure d'un bon prompt

```
[LANGUE]
[AUDIENCE]
[OBJECTIF]
[FOCUS/INCLURE]
[EXCLURE]
[TON]
[DURÉE]
[STRUCTURE]
```

---

## 📊 TEMPLATE 1 : Briefing Exécutif (5min)

### Use case
Présenter un sujet technique à la direction

### Instructions
```
Language: French
Target audience: C-level executives, board members, non-technical stakeholders
Goal: Enable strategic decision-making on [TOPIC]
Focus on: 
- Business impact

# NotebookLM - Jour 1 Matinée : Tester les Limites

## 📋 Vue d'ensemble (09h-10h30)

**Objectif** : Comprendre quand NotebookLM excelle et quand il atteint ses limites

---

## 1️⃣ Versions NotebookLM - Comparatif

| Critère | **Free** | **Plus** | **Enterprise** |
|---------|----------|----------|----------------|
| **Prix** | Gratuit | $14-22/mois (Workspace)<br>$20/mois (Google One AI Premium) | Sur devis |
| **Notebooks** | 20 | 100 | Illimité |
| **Sources/notebook** | 50 | 30

# DORA - Digital Operational Resilience Act

## Définition
Règlement européen entré en vigueur le **17 janvier 2025** pour renforcer la résilience numérique du secteur financier.

## Objectifs
- Garantir que les institutions financières peuvent **résister, répondre et se remettre** de perturbations ICT (cyber-attaques, pannes systèmes)
- Harmoniser les règles de cybersécurité dans l'UE
- Superviser les fournisseurs IT critiques du secteur financier

## Qui est concerné ?
- Banques
- 

-- Create database
CREATE DATABASE pc_repair_service;
USE pc_repair_service;

-- Customers table
CREATE TABLE customers (
    customer_id INT AUTO_INCREMENT PRIMARY KEY,
    full_name VARCHAR(100) NOT NULL,
    email VARCHAR(100) UNIQUE,
    phone VARCHAR(20),
    address TEXT,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

-- Devices table
CREATE TABLE devices (
    device_id INT AUTO_INCREMENT PRIMARY KEY,
    customer_id INT NOT NULL,
    device_type VARCHAR(50),   -- e.g., Laptop, De

/**
 * Given a matrix of heights, returns coordinates of cells that can flow to both the Pacific and Atlantic oceans.
 * Pacific touches the left and top edges; Atlantic touches the right and bottom edges.
 * @param {number[][]} heights - 2D grid of elevation values
 * @return {number[][]} - List of coordinates [i, j] that can reach both oceans
 */
var pacificAtlantic = function(heights) {
    let row = heights.length;
    let col = heights[0].length;
    let arr = []; // Stores final result: ce

grasp - physical or mental. If mental, difference between understand/catch on to sth.
  used mostly as "physical"
diminutive - use with comparison. Business, academic language
resent
go to work
partially

### **1. Sending Form Data with Fetch (FormData object)**

If you already have a `<form>` element in HTML:

```html
<form id="myForm">
  <input type="text" name="username" placeholder="Enter username">
  <input type="email" name="email" placeholder="Enter email">
  <button type="submit">Submit</button>
</form>
```

You can submit it with JavaScript:

```javascript
document.getElementById('myForm').addEventListener('submit', async function (e) {
  e.preventDefault(); // prevent default form submi

# Fetch API Usage

1. Handling `FormData` (`multipart/form-data`)
2. Handling JSON (`application/json`)

---

## **1. PHP Backend for FormData (multipart/form-data)**

If you send data using `FormData`, the browser automatically sends it as `multipart/form-data`.

Example Fetch:

```javascript
const formData = new FormData();
formData.append("username", "Ryan");
formData.append("email", "test@example.com");

fetch("process.php", {
  method: "POST",
  body: formData
});
```

PHP (`process.php`):

## 📝 JavaScript DOM Manipulation Cheat Sheet

### 🔍 Selecting Elements

```js
document.getElementById("id");              // By ID
document.getElementsByClassName("class");   // By class (HTMLCollection)
document.getElementsByTagName("tag");       // By tag
document.querySelector("cssSelector");      // First match
document.querySelectorAll("cssSelector");   // All matches (NodeList)
```

---

### ✏️ Changing Content

```js
element.textContent = "Hello World";   // Text only
element.innerHTML = 

### 🔹 **JavaScript Form Events Reference**

| **Event**    | **Description**                                                                                 | **Typical Use**                                     |
| ------------ | ----------------------------------------------------------------------------------------------- | --------------------------------------------------- |
| **submit**   | Fired when a form is submitted.                                                                 | Val

<?php
require __DIR__ . '/vendor/autoload.php';

use Dotenv\Dotenv;

class Database {
    private $pdo;
    private static $instance = null;

    private function __construct() {
        // Load .env
        $dotenv = Dotenv::createImmutable(__DIR__);
        $dotenv->load();

        $host    = $_ENV['DB_HOST'];
        $db      = $_ENV['DB_NAME'];
        $user    = $_ENV['DB_USER'];
        $pass    = $_ENV['DB_PASS'];
        $charset = $_ENV['DB_CHARSET'] ?? 'utf8mb4';

        $dsn = "mysq

/**
 * @param {number[]} height
 * @return {number}
 */
var maxArea = function(height) {
    // Initialize two pointers: one at the start, one at the end of the array
    let left = 0;
    let right = height.length - 1;

    // Variable to keep track of the maximum area found so far
    let maxArea = 0;

    // Loop until the two pointers meet
    while (left < right) {
        // Calculate the width between the two lines
        let width = right - left;

        // Calculate the height of the 

# Openshift Cheatsheet

## Work with projects (Kubernetes namespaces)

1) Run `oc get project` to get all projects.
2) Run `oc project [project-name]` to change project.

## Create an application from a container image
 * `oc new-app [image-path]`: Create an application
 * `oc expose service/[app-name]`: Create a route to expose access to the application.
 
## Get the application’s Kubernetes label and Delete resources
 * `oc get deployment --show-labels`: The result should be as below and the l

<?php
$states = array(
    'AL' => 'Alabama',
    'AK' => 'Alaska',
    'AZ' => 'Arizona',
    'AR' => 'Arkansas',
    'CA' => 'California',
    'CO' => 'Colorado',
    'CT' => 'Connecticut',
    'DE' => 'Delaware',
    'FL' => 'Florida',
    'GA' => 'Georgia',
    'HI' => 'Hawaii',
    'ID' => 'Idaho',
    'IL' => 'Illinois',
    'IN' => 'Indiana',
    'IA' => 'Iowa',
    'KS' => 'Kansas',
    'KY' => 'Kentucky',
    'LA' => 'Louisiana',
    'ME' => 'Maine',
    'MD' => 'Maryland',
    'MA' =>