All Security Engineering Courses

✅ CRUD Operations in Back-End Development 🛠📦 Now that you’ve built a basic server, let’s take it a step further by adding full CRUD functionality — the foundation of most web apps. 🔁 What is CRUD? CRUD stands for: ⦁ C reate → Add new data (e.g., new user) ⦁ R ead → Get existing data (e.g., list users) ⦁ U pdate → Modify existing data (e.g., change user name) ⦁ D elete → Remove data (e.g., delete user) These are the 4 basic operations every back-end should support. 🧪 Let’s Build a CRUD API We’ll use the same setup as before (Node.js + Express) and simulate a database with an in-memory array. Step 1: Setup Project (if not already)

npm init -y
npm install express

Step 2: Create server.js

const express = require('express');
const app = express();
const port = 3000;

app.use(express.json()); // Middleware to parse JSON

let users = [
  { id: 1, name: 'Alice'},
  { id: 2, name: 'Bob'}
];

// READ - Get all users
app.get('/users', (req, res) => {
  res.json(users);
});

// CREATE - Add a new user
app.post('/users', (req, res) => {
  const newUser = {
    id: users.length + 1,
    name: req.body.name
  };
  users.push(newUser);
  res.status(201).json(newUser);
});

// UPDATE - Modify a user
app.put('/users/:id', (req, res) => {
  const userId = parseInt(req.params.id);
  const user = users.find(u => u.id === userId);
  if (!user) return res.status(404).send('User not found');
  user.name = req.body.name;
  res.json(user);
});

// DELETE - Remove a user
app.delete('/users/:id', (req, res) => {
  const userId = parseInt(req.params.id);
  users = users.filter(u => u.id!== userId);
  res.sendStatus(204);
});

app.listen(port, () => {
  console.log(`CRUD API running at http://localhost:${port}`);
});

Step 3: Test Your API Use tools like Postman or cURL to test: ⦁ GET /users → List users ⦁ POST /users → Add user { "name": "Charlie"} ⦁ PUT /users/1 → Update user 1’s name ⦁ DELETE /users/2 → Delete user 2 🎯 Why This Matters ⦁ CRUD is the backbone of dynamic apps like blogs, e-commerce, social media, and more ⦁ Once you master CRUD, you can connect your app to a real database and build full-stack apps Next Steps ⦁ Add validation (e.g., check if name is empty) ⦁ Connect to MongoDB or PostgreSQL ⦁ Add authentication (JWT, sessions) ⦁ Deploy your app to the cloud 💡 Pro Tip: Try building a Notes app or a Product Inventory system using CRUD! Join Us For More.... 🔥Telegram🔥: https://t.me/SuBoXoneSoCiety ☠️Darkweb room☠️: http://suboxone2fzkkkeuezwozbbajgqargceo62wdx3f53awty6dv4mzzbad.onion 🫂Whatsapp community🫂 :https://whatsapp.com/channel/0029VaGX1X47T8bP63aZhb22

💻 Back-End Development Basics ⚙️ Back-end development is the part of web development that works behind the scenes. It handles data, business logic, and communication between the front-end (what users see) and the database. What is Back-End Development? - It powers websites and apps by processing user requests, storing and retrieving data, and performing operations on the server. - Unlike front-end (design & interactivity), back-end focuses on the logic, database, and servers. Core Components of Back-End 1. Server    A server is a computer that listens to requests (like loading a page or submitting a form) and sends back responses. 2. Database    Stores all the data your app needs — user info, posts, products, etc.     Types of databases:     - _SQL (Relational):_ MySQL, PostgreSQL     - _NoSQL (Non-relational):_ MongoDB, Firebase 3. APIs (Application Programming Interfaces)     Endpoints that let the front-end and back-end communicate. For example, getting a list of users or saving a new post. 4. Back-End Language & Framework     Common languages: JavaScript (Node.js), Python, PHP, Ruby, Java Frameworks make coding easier: Express (Node.js), Django (Python), Laravel (PHP), Rails (Ruby) How Does Back-End Work? User → Front-End → Sends Request → Server (Back-End) → Processes Request → Queries Database → Sends Data Back → Front-End → User Simple Example: Create a Back-End Server Using Node.js & Express Let’s build a tiny app that sends a list of users when you visit a specific URL. Step 1: Setup your environment - Install Node.js from nodejs.org  - Create a project folder and open terminal there  - Initialize project & install Express framework: 

npm init -y
npm install express

Step 2: Create a file server.js

const express = require('express');
const app = express();
const port = 3000;

// Sample data - list of users
const users = [
  { id: 1, name: 'Alice' },
  { id: 2, name: 'Bob' }
];

// Create a route to handle GET requests at /users
app.get('/users', (req, res) => {
  res.json(users);  // Send users data as JSON response
});

// Start the server
app.listen(port, () => {
  console.log(Server running on http://localhost:${port});
});

Step 3: Run the server In terminal, run: node server.js Step 4: Test the server Open your browser and go to:  http://localhost:3000/users You should see:

[
  { "id": 1, "name": "Alice" },
  { "id": 2, "name": "Bob" }
]

What Did You Build? - A simple server that _listens_ on port 3000  - An _API endpoint_ /users that returns a list of users in JSON format  - A basic back-end application that can be connected to a front-end Why Is This Important? - This is the foundation for building web apps that require user data, logins, content management, and more.  - Understanding servers, APIs, and databases helps you build full-stack applications. What’s Next? - Add routes for other operations like adding (POST), updating (PUT), and deleting (DELETE) data.  - Connect your server to a real database like MongoDB or MySQL.  - Handle errors, validations, and security (authentication, authorization).  - Learn to deploy your back-end app to the cloud (Heroku, AWS). 🎯 Pro Tip: Start simple and gradually add features. Try building a small app like a To-Do list with a back-end database. Join Us For More.... 🔥Telegram🔥: https://t.me/SuBoXoneSoCiety ☠️Darkweb room☠️: http://suboxone2fzkkkeuezwozbbajgqargceo62wdx3f53awty6dv4mzzbad.onion 🫂Whatsapp community🫂 :https://whatsapp.com/channel/0029VaGX1X47T8bP63aZhb22

✅ Version Control with Git & GitHub 🗂️ Version control is a must-have skill in web development! It lets you track changes in your code, collaborate with others, and avoid "it worked on my machine" problems 😅 📌 What is Git? Git is a distributed version control system that lets you save snapshots of your code. 📌 What is GitHub? GitHub is a cloud-based platform to store Git repositories and collaborate with developers. 🛠️ Basic Git Commands (with Examples) 1️⃣ git init Initialize a Git repo in your project folder.

git init

2️⃣ git status Check what changes are untracked or modified.

git status

3️⃣ git add Add files to staging area (preparing them for commit).

git add index.html
git add.     # Adds all files

4️⃣ git commit Save the snapshot with a message.

git commit -m "Added homepage structure"

5️⃣ git log See the history of commits.

git log

🌐 Using GitHub 6️⃣ git remote add origin Connect your local repo to GitHub.

git remote add origin https://github.com/yourusername/repo.git

7️⃣ git push Push your local commits to GitHub.

git push -u origin main

8️⃣ git pull Pull latest changes from GitHub.

git pull origin main

👥 Collaboration Basics 🔀 Branching & Merging

git branch feature-navbar
git checkout feature-navbar
# Make changes, then:
git add.
git commit -m "Added navbar"
git checkout main
git merge feature-navbar

🔁 Pull Requests Used on GitHub to review & merge code between branches. 🎯 Project Tip: Use Git from day 1—even solo projects! It builds habits and prevents code loss. 💬 React ❤️ for more!

👣 Dominando el Dominio: Movimiento Lateral. • El movimiento lateral en red teaming consiste en moverse entre objetivos en el entorno para alcanzar el objetivo final. - Contraseña; - WinRM; - RDP; - MSSQL; - SMB; - Shell interactivo; - NTHash; - Pass-the-Hash; - Overpass-the-Hash; - Pass-the-Key; - MSSQL; - Ejecutar comandos del sistema operativo; - Abuso de enlace confiable en MS SQL; - SCCM (MECM); - Cosecha de credenciales; - Cuenta de acceso a la red; - Credenciales push del cliente; - Despliegue de aplicaciones y scripts; - Investigación de seguridad. #Pentest 🩵Follow us Join Us For More.... 🔥Telegram🔥: https://t.me/SuBoXoneSoCiety ☠️Darkweb room☠️: http://suboxone2fzkkkeuezwozbbajgqargceo62wdx3f53awty6dv4mzzbad.onion 🫂Whatsapp community🫂 :https://whatsapp.com/channel/0029VaGX1X47T8bP63aZhb22

🔰 Master Python: From Beginner to Advanced Projects 🌟 4.5 - 2 votes 💰 Original Price: $19.99

📖 Learn Python programming, build real-world projects, master OOP, SQL, and create professional documentation.

🔊 Taught By: Rafael Abreu 📤 Download All Courses

🔰 Improve your coding logic

SEC660 course: Advanced Penetration Testing, Exploit Writing, and Ethical Hacking🔥🆕 👨‍💻 Password : @WickHelps 👍 Exam Guide : link ❗️ Backup all channels link 👨‍💻 Proof of work Link 🚀 Any-Issues: Chat Here 🖥 Download Here1 Here2

Udemy course - Windbg : A complete guide for Advanced Windows Debugging🔥🆕 👨‍💻 Password : @WickHelps 👍 Exam Guide : link ❗️ Backup all channels link 👨‍💻 Proof of work Link 🚀 Any-Issues: Chat Here 🖥 Download Here1 Here2

📂 Full description From medical devices to a cars dashboard to a video game controller, embedded systems are all around us. Learning to write embedded software in C will help you deliver applications that are small, efficient, and fast. In this course, instructor Eduardo Corpeño explains how C programming and the Internet of Things combine in embedded applications—software that permanently resides on a device—and demonstrates the challenges unique to this type of programming, ranging from memory, storage, and power limitations to hardware awareness.

Ultimate Linux Training: Troubleshooting Skills for Success

info: https://www.udemy.com/course/red-hat-linux-administration-advance-level-troubleshooting

📅 Updated: 10-2024 ✔️

🔓Password: @UdemyPie

🔥 Black Friday Deal – Limited Time! 🔥 🔽 2000GB Traffic ⏳ 365 Days Plan 💸 Only $50 [Crypto & Voucher] ⚡️ Don’t miss out — grab the deal before it's gone! ℹ️ Already have an active plan? No problem! You can still purchase this offer — your subscriptions will be merged automatically, and no time or traffic will be lost. 💳 Voucher Payment: If you want to pay using vouchers, please purchase a 50 USD Rewarble Voucher from one of the websites below and send it via Ticket for activation: 1️⃣G2a - 50 USD Rewarble 2️⃣Eneba - 50 USD Rewarble 💸 Crypto Payment: If you want to pay using crypto, please visit the link below and submit your transaction hash: vip.hide01.ir/panel/subscription/12 ❔ If you have any questions regarding the plan, you can reach us through Ticket