Introduction to Amazon EC2 > Deploying an AWS User Management Application on Amazon Linux 2023 > Deploying application on Linux Instance

Deploying application on Linux Instance

Deploy applications on Linux

We use git to clone the source code. First of all, install git with the following command:
```
sudo dnf install git
```
Check successful git installation with command
```
git version
```

Clone repository application code

cd ~ec2-user
git clone https://github.com/First-Cloud-Journey/000004-EC2.git

create vpc for linux instance

Go to the lab directory 000004-EC2 and check the files
```
cd 000004-EC2
```
```
ls
```
NPM stands for Node package manager and is a tool to create and manage Javascript programming libraries for Node.js. Using npm init to initialize the project will generate a sample package.json file.
```
npm init
```
Note: You proceed to configure the application’s information and it is saved in the file package.json
Next we do dependencies installation
- express
- Dotenv
- express-handlebars
- body-parser
- mysql
```
npm install express dotenv express-handlebars body-parser mysql
```
! How to Fix Vulnerabilities Related to Nodemon If the number of vulnerabilities is greater than 0 after running npm update and npm audit fix, you can try removing and reinstalling nodemon by following these steps:
- Step 1: Remove nodemon:
```
npm uninstall nodemon
```
- Step 2: Install the latest version of nodemon:
```
npm install nodemon@latest --save-dev
```
- Step 3: Check vulnerabilities again
```
npm audit
```
Explanation:
- nodemon is a development tool that automatically restarts the application when code changes.
- Older versions of nodemon may include dependencies with security vulnerabilities.
- Reinstalling nodemon updates its dependencies to safer versions.
Check the installed dependencies. The node_modules folder appears.
```
ls
```
Create file .env
```
touch .env
```
Use vi to edit the .env file. We perform the database configuration:
```
DB_HOST=localhost
DB_NAME=awsuser
DB_USER=root
DB_PASS=password
```
Quick Guide to using vi/vim:
- Open a file: vi <filename>
- Enter insert mode: Press i
- Save and exit: Press Esc, then type :wq and press Enter
- Quit without saving: Press Esc, then type :q! and press Enter

In the lab we use the database name awsuser and the database information has been configured in the database security configuration step (password: 123Admin)

Check database configuration
```
ls -a
```
Start local server
```
npm start
```

! Fix TypeError: exphbs is not a function (Express Handlebars)

Problem: When starting the Express application, the following error appears:

TypeError: exphbs is not a function

Cause: Newer versions of express-handlebars changed how the module is imported and initialized. The old syntax is no longer supported.
Solution: You can use ‘vi’ or ’nano’ to edit file app.js, replace:
- const exphbs = require('express-handlebars'); with:
```
const { engine } = require('express-handlebars');
```
- And app.engine('hbs', engine({ extname: '.hbs' })); with:
```
app.engine('hbs', engine({ extname: '.hbs' }));
```

create vpc for linux instance

In the EC2 interface
- Select Instances
- Select Linux-instance
- Copy Public IPv4 DNS address
Paste Public DNS IPv4 address into the browser and port 5000. Observe the AWS FCJ Management interface

In the phpMyAdmin interface, we execute SQL Dummy Data

Select awsuser database
Select SQL
Paste the SQL query code in

INSERT INTO `user` 
(`id`, `first_name`,  `last_name`,    `email`,                 `phone`,         `comments`, `status`) VALUES
(NULL, 'Amanda',      'Nunes',        'anunes@ufc.com',        '012345 678910', '',          'active'),
(NULL, 'Alexander',   'Volkanovski',  'avolkanovski@ufc.com',  '012345 678910', '',          'active'),
(NULL, 'Khabib',      'Nurmagomedov', 'knurmagomedov@ufc.com', '012345 678910', '',          'active'),
(NULL, 'Kamaru',      'Usman',        'kusman@ufc.com',        '012345 678910', '',          'active'),
(NULL, 'Israel',      'Adesanya',     'iadesanya@ufc.com',     '012345 678910', '',          'active'),
(NULL, 'Henry',       'Cejudo',       'hcejudo@ufc.com',       '012345 678910', '',          'active'),
(NULL, 'Valentina',   'Shevchenko',   'vshevchenko@ufc.com',   '012345 678910', '',          'active'),
(NULL, 'Tyron',       'Woodley',      'twoodley@ufc.com',      '012345 678910', '',          'active'),
(NULL, 'Rose',        'Namajunas ',   'rnamajunas@ufc.com',    '012345 678910', '',          'active'),
(NULL, 'Tony',        'Ferguson ',    'tferguson@ufc.com',     '012345 678910', '',          'active'),
(NULL, 'Jorge',       'Masvidal ',    'jmasvidal@ufc.com',     '012345 678910', '',          'active'),
(NULL, 'Nate',        'Diaz ',        'ndiaz@ufc.com',         '012345 678910', '',          'active'),
(NULL, 'Conor',       'McGregor ',    'cmcGregor@ufc.com',     '012345 678910', '',          'active'),
(NULL, 'Cris',        'Cyborg ',      'ccyborg@ufc.com',       '012345 678910', '',          'active'),
(NULL, 'Tecia',       'Torres ',      'ttorres@ufc.com',       '012345 678910', '',          'active'),
(NULL, 'Ronda',       'Rousey ',      'rrousey@ufc.com',       '012345 678910', '',          'active'),
(NULL, 'Holly',       'Holm ',        'hholm@ufc.com',         '012345 678910', '',          'active'),
(NULL, 'Joanna',      'Jedrzejczyk ', 'jjedrzejczyk@ufc.com',  '012345 678910', '',          'active')

Select Format
Select Go

create vpc for linux instance

Refresh the application interface

create vpc for linux instance

View the user

create vpc for linux instance

Edit users

create vpc for linux instance

Add users
Search for users
Database after inserting the item
The interface of the instance when starting the local server