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Chapter 12: Technology Stacks — LAMP, LEMP, MEAN, MERN

12.2 LAMP stack

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Friends, LAMP is the oldest and most trusted stack – apps like WordPress run on it. Let's install Apache, PHP and MariaDB and test right away.

                        +------------------ EC2 (Linux) -------------------+
  Browser ──HTTP:80──►  |  Apache (httpd / apache2)                        |
                        |     └─ PHP (mod_php or PHP-FPM) ──► MySQL/MariaDB|
                        |        /var/www/html/*.php         127.0.0.1:3306|
                        +--------------------------------------------------+

Full LAMP installation

Amazon Linux 2023:

sudo yum install -y httpd php php-fpm php-mysqlnd php-gd php-mbstring php-xml mariadb105-server
sudo service httpd start
sudo service php-fpm start
sudo service mariadb start
sudo systemctl enable httpd php-fpm mariadb
sudo mysql_secure_installation

Ubuntu 22.04 / 24.04:

sudo apt update
sudo apt install -y apache2 mysql-server php libapache2-mod-php php-mysql php-gd php-mbstring php-xml
sudo service apache2 start
sudo service mysql start
sudo systemctl enable apache2 mysql
sudo mysql_secure_installation

CentOS Stream 9:

sudo yum install -y httpd php php-fpm php-mysqlnd php-gd php-mbstring php-xml mariadb-server
sudo service httpd start
sudo service php-fpm start
sudo service mariadb start
sudo systemctl enable httpd php-fpm mariadb
sudo mysql_secure_installation
if systemctl is-active --quiet firewalld; then sudo firewall-cmd --permanent --add-service=http && sudo firewall-cmd --reload; fi

Test the stack

sudo tee /var/www/html/dbtest.php > /dev/null <<'EOF'
<?php
$conn = new mysqli("127.0.0.1", "appuser", "App@Pass123", "appdb");
if ($conn->connect_error) { die("DB connection failed: " . $conn->connect_error); }
echo "<h2>LAMP/LEMP works! PHP " . phpversion() . " connected to MySQL " . $conn->server_info . "</h2>";
EOF
curl -s http://localhost/dbtest.php

(Create appuser/appdb first as in Chapter 10. Delete dbtest.php after testing.) Deploy any PHP app by copying it to /var/www/html or a virtual-host folder (Chapter 7), exactly like WordPress in Chapter 11.

Ravindra Bagale's Tip

In an interview, don't just expand the acronym. Draw the request flow: browser → web server → language runtime → database, and mention the ports and process managers. That shows you actually deployed the stack, not just memorised it.

Lab

Chala, Amazon Linux 2023 var LAMP install kara, Chapter 10 pramane appuser/appdb banva aani curl -s http://localhost/dbtest.php ne "LAMP/LEMP works!" disto ka te bagha. Test zala ki dbtest.php delete kara.