Install a LAMP Stack on Ubuntu 22.04

The LAMP Stack includes an operating system, web server, programming language, and database. These applications are collectively able to implement web applications and other computing solutions. This guide provides some background about the LAMP stack and explains how to install and configure it on Ubuntu 22.04 LTS. It also explains how to quickly test interactions between the applications.

What is a LAMP Stack?

The LAMP Stack is an acronym for Linux, Apache , MySQL , and PHP . It includes an operating system, a web server, a database, and a versatile programming language. All components are available through the default Ubuntu software repositories.

The LAMP Stack is sufficient to host web applications and implement a modern computing environment. Many other Ubuntu applications rely on some or all of these programs. In some cases, substitutions to the LAMP stack can be made. For example, the NGINX web server can be used instead of Apache. Each component has a role within the software stack.

• Linux: Linux is an operating system based on UNIX. Linux is available for free as open source technology. There are several distinct implementations of Linux, which are known as distributions. Ubuntu is one of the most popular distributions. Other alternatives include Debian, Red Hat, Arch, and many, many others. Each distribution of Linux is associated with a software library. This library is used to install other software, including the other LAMP stack components.
• Apache HTTP Server: Apache is the most common web server for Ubuntu and throughout the public internet. The Apache Software Foundation develops and releases Apache as free and open source software. The standard version of Apache includes all components required to host a web site. However, extra modules can be used to add features including authentication and programming language APIs.
• MySQL: MySQL is a relational database management system (RDBMS). Although owned by Oracle, MySQL is free. Its source code is available under the GNU General Public License. MariaDB or PostgreSQL sometimes replace MySQL in the stack.
• PHP: PHP is the server-side scripting and programming language used in the stack. It is commonly used in web development and is firmly integrated with the rest of the stack. An Ubuntu system interprets PHP code using a PHP processor. PHP commands can be efficiently embedded within an HTML page. PHP software is available for free under the PHP License. Alternatives to PHP include Perl and Python, which can also serve as the P in the LAMP stack.

Before You Begin

1. If you have not already done so, create a Linode account and Compute Instance. See our Getting Started with Linode and Creating a Compute Instance guides.

2. Follow our Setting Up and Securing a Compute Instance guide to update your system. You may also wish to set the timezone, configure your hostname, create a limited user account, and harden SSH access.

Installing a LAMP Stack on Ubuntu

This section explains how to install a LAMP Stack on Ubuntu 22.04 LTS. These instructions are also generally valid for Ubuntu 20.04 LTS.

To install the LAMP stack on Ubuntu 22.04 LTS, follow these steps. In all cases, enter y to proceed with the installation when asked for confirmation.

1. Using apt, update the Ubuntu packages:

   sudo apt update && sudo apt upgrade

2. Install the Apache web server using apt:

   sudo apt install apache2

3. Install the MySQL web server:

   sudo apt install mysql-server

4. Install PHP, along with additional PHP modules for Apache and MySQL:

   sudo apt install php libapache2-mod-php php-mysql

5. (Optional) Install the following commonly-used PHP modules. These packages add PHP support for cURL, JavaScript Object Notation (JSON), and the Common Gateway Interface (CGI).

   sudo apt install php-curl php-json php-cgi

6. (Optional) To host a WordPress site on the server, install the following PHP components:

   sudo apt install php-curl php-gd php-mbstring php-xml php-xmlrpc

How to Configure the LAMP Stack for Ubuntu 22.04

At this point, all LAMP Stack components are installed, but the stack is not yet ready to use. The individual elements must be configured or enabled. Each component can immediately be configured when it is installed, but it is usually easier to install the applications first and then configure them later. The following sections explain how to configure a LAMP stack on Ubuntu 22.04.

Configuring the Apache Web Server

1. Adjust the default Apache keepalive settings to allow the server to better conserve memory. The KeepAlive setting should be set to On. This allows Apache to reuse connections. When KeepAlive is enabled, MaxKeepAliveRequests and KeepAliveTimeouts should also be configured. Edit the apache2.conf file and make the following changes.

   Note

   MaxKeepAliveRequests limits the number of requests for each persistent connection. KeepAliveTimeouts determines how long the server waits for new requests from a connection. The following sample configuration balances performance and memory utilization. These values are a good starting point for a new installation. However, it is a good idea to test different values to determine the optimal settings.

   File: /etc/apache2/apache2.conf

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   KeepAlive On MaxKeepAliveRequests 50 KeepAliveTimeout 5

2. Change the default multi-processing module settings within the prefork module. Edit the /etc/apache2/mods-available/mpm_prefork.conf file to reflect the following changes.

   Note

   The following values are optimized for a 2GB Linode. Systems with more capacity can handle more aggressive settings.

   File: /etc/apache2/mods-available/mpm_prefork.conf

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   <IfModule mpm_prefork_module> StartServers 4 MinSpareServers 3 MaxSpareServers 40 MaxRequestWorkers 200 MaxConnectionsPerChild 10000 </IfModule>

3. Using the console, configure ufw to allow the Apache Full profile. This setting permits HTTP and HTTPS connections through the firewall, enabling web access. Ensure OpenSSH connections are also allowed. Enable ufw when all changes are complete.

   Note

   The Apache Full profile allows both HTTP and HTTPS traffic. To temporarily limit firewall access to HTTP requests during configuration, use the Apache profile instead. The Apache Secure profile only allows encrypted HTTPS traffic through the firewall. Do not use this profile until HTTPS is enabled on the server.

   sudo ufw allow OpenSSH
   sudo ufw allow in "Apache Full"
   sudo ufw enable

4. Verify the firewall settings using the ufw status command:

   sudo ufw status

   Status: active
   
   To                         Action      From
   --                         ------      ----
   OpenSSH                    ALLOW       Anywhere
   Apache Full                ALLOW       Anywhere
   OpenSSH (v6)               ALLOW       Anywhere (v6)
   Apache Full (v6)           ALLOW       Anywhere (v6)
       

5. Disable the mpm_event module and enable the mpm_prefork module using the a2dismod and a2enmod commands. Depending on the installation, these settings might already be configured.

   sudo a2dismod mpm_event
   sudo a2enmod mpm_prefork

6. Restart Apache using the systemctl utility:

   sudo systemctl restart apache2

7. Ensure Apache is still active after the restart:

   sudo systemctl status apache2

   apache2.service - The Apache HTTP Server
       Loaded: loaded (/lib/systemd/system/apache2.service; enabled; vendor prese>
       Active: active (running) since Wed 2022-05-11 10:45:23 UTC; 6s ago
       

8. Apache is now ready to respond to incoming requests. To verify the server is working properly, visit the IP address of the web server using a web browser. The browser should display the default Ubuntu/Apache2 welcome page. The page includes the message “It works” and some basic information about the installation.

   Note

   Use the Linode Dashboard to find the IP address for your Ubuntu system.

   http://your_IP_address/

   

For more information about configuring the Apache HTTP Server, see the Apache Documentation .

Configuring a Virtual Host for Your Domain on Apache

A virtual host should be configured for the domain, even if the server is only hosting one site. A virtual host collects the domain details in one place. It also makes it easier to modify the site or add more domains in the future.

Apache creates a default virtual host file in the var/www/html directory when it is installed. Leave this file in place and create a new virtual host for the domain in the same directory. If the server is hosting multiple sites, a separate virtual host must be configured for each domain.

To configure a virtual host, follow these steps. Replace example.com with the actual domain name wherever it occurs.

1. It is easiest to use the default file as a basis for the new virtual host. Copy the default Apache configuration file to /etc/apache2/sites-available/example.com.conf. The new configuration file must have the same name as the domain and have the .conf extension.

   sudo cp /etc/apache2/sites-available/000-default.conf /etc/apache2/sites-available/example.com.conf

2. Add the following changes to the .conf file. Replace example.com with the actual name of the domain.

   • Uncomment the ServerName field and add the name of the domain.
   • Add a ServerAlias This must be set to the domain name preceded with www.. This allows users to access the site with or without the www prefix.
   • Edit the DocumentRoot, ErrorLog, and CustomLog fields so they point to the directory associated with the new domain. The DocumentRoot must be set to /var/www/html/yourdomainname/public_html.

   File: /etc/apache2/sites-available/example.com.conf

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   <Directory /var/www/html/example.com/public_html> Require all granted </Directory> <VirtualHost *:80> ServerName example.com ServerAlias www.example.com ServerAdmin webmaster@localhost DocumentRoot /var/www/html/example.com/public_html ErrorLog /var/www/html/example.com/logs/error.log CustomLog /var/www/html/example.com/logs/access.log combined </VirtualHost>

3. Create the public_html and logs directories for the domain. Ensure there is no space between public_html and logs. The two entries must be separated with a comma.

   sudo mkdir -p /var/www/html/example.com/{public_html,logs}

4. Change the owner of the public_html to www-data:

   sudo chown -R www-data:www-data /var/www/html/example.com/public_html

5. Set the directory permissions for the public_html directory:

   sudo chmod -R 755 /var/www/html/example.com/public_html

6. Use a2ensite to link the virtual hosts file and enable the site:

   sudo a2ensite example.com

   Enabling site example.com
       

7. (Optional) As a security precaution, disable the default site:

   sudo a2dissite 000-default.conf

8. Reload Apache to apply all the changes:

   Note

   If Apache fails to reload, validate the syntax of the configuration files. Use the command sudo apache2ctl configtest to find any potential errors in the .conf file. Ensure the name of the virtual host matches the domain name being used.

   sudo systemctl reload apache2

9. Verify whether the domain is accessible. The DNS record for the domain must already resolve to the Linode. Visit the domain using a browser, entering the domain name in the address bar. The contents of the DocumentRoot directory for the domain should be visible. No files have been added to the directory yet, so the browser displays an empty index page that does not have any files or directories.

   

Configuring the MySQL Database

The MySQL database is ready to use as soon as it is installed. However, it is necessary to create a database user for the web application and increase application security. To finish configuring MySQL, follow these steps.

1. Log in to the MySQL shell as the root user. The application displays the mysql> prompt.

   sudo mysql -u root

   Welcome to the MySQL monitor.  Commands end with ; or \g.
   Your MySQL connection id is 10
   Server version: 8.0.29-0ubuntu0.22.04.2 (Ubuntu)
   ...
   Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
   
   mysql>
       

2. From the MySQL shell, create the webdata database. Create a new user account for web application access. Provide an actual user name and password in place of webuser and password in the CREATE USER query. Grant full rights to the user. MySQL should respond with Query OK after each line.

   CREATE DATABASE webdata;
   CREATE USER 'webuser' IDENTIFIED BY 'password';
   GRANT ALL ON webdata.* TO 'webuser';

3. Exit the SQL shell:

   quit

4. The latest release of MySQL requires a root password before mysql_secure_installation can be used. Enter the SQL shell again using sudo mysql but do not provide a user.

   sudo mysql

5. Set a password for root'@'localhost. Use an actual secure password instead of password.

   ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password by 'password';

6. Exit the SQL shell:

   Note

   To log in to the MySQL shell as root after this change, use mysql -u root -p and provide the password when prompted.

   exit

7. Use the built-in mysql_secure_installation tool to increase the security of the database. Provide the MySQL password for the root account upon request.

   sudo mysql_secure_installation

8. When prompted to change the root password, leave it unchanged. But answer Y for the following questions:

   • Remove anonymous users?
   • Disallow root login remotely?
   • Remove test database and access to it?
   • Reload privilege tables now?

For more information on how to configure and use MySQL, see the MySQL Reference Manual .

Configuring PHP

PHP does not require nearly as much configuration as the other parts of the LAMP stack. However, it can be fine-tuned, and some logs should be added. To configure PHP on Ubuntu, follow these guidelines. Further information about PHP can be found in the PHP Documentation Site .

1. First verify which PHP release is installed using the -v option. Store this information for the next step.

   php -v

   PHP 8.1.2-1ubuntu2.6 (cli) (built: Sep 15 2022 11:30:49) (NTS)
   Copyright (c) The PHP Group
   Zend Engine v4.1.2, Copyright (c) Zend Technologies
       with Zend OPcache v8.1.2-1ubuntu2.6, Copyright (c), by Zend Technologies
       

2. PHP errors are easier to debug if error messages and logging are enabled. The max_input_time parameter can be adjusted to allow better performance. Edit the php.ini file and make the following changes. This file is found in the /etc/php/php_version/apache2 directory, where php_version consists of the major and minor release of PHP. In this example, the PHP release is 8.1, so the correct file is /etc/php/8.1/apache2/php.ini.

   Note

   Ensure these variables are not commented out. If necessary, remove the ; character at the start of the line.

   File: /etc/php/8.1/apache2/php.ini

   1 2 3

   error_reporting = E_COMPILE_ERROR | E_RECOVERABLE_ERROR | E_ERROR | E_CORE_ERROR error_log = /var/log/php/error.log max_input_time = 30

3. Create the PHP error log and assign ownership of the log to the web server:

   sudo mkdir /var/log/php
   sudo chown www-data /var/log/php

4. Restart the Apache server to apply the PHP changes:

   sudo systemctl restart apache2

Testing the LAMP Stack Installation on Your Ubuntu Server

Earlier tests verified the operational status of Apache and the configuration of the virtual host. However, it is also important to test PHP and the MySQL database. In particular, the web server must be able to interact with both components.

The easiest way to verify the Ubuntu LAMP Stack configuration is with a short test script. The PHP code does not have to be long or complicated. However, the code must initiate a connection to MySQL. The script must be placed somewhere within the DirectoryRoot directory.

For database validation, use PHP to call the mysqli_connect function. Pass the user name and the password for the account created in the Configuring the MySQL Database section to MySQL. The mysqli_connect function returns a Connection object if the attempt is successful. The script indicates whether the connection succeeded or not, and provides more information about any failures.

To validate the installation, follow these steps.

1. Create a new file named phptest.php in the public_html directory for the domain. Ensure the servername variable is set to localhost and the username and password match the details of the MySQL web user account.

   File: /var/www/html/example.com/public_html/phptest.php

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   <html> <head> <title>PHP Test</title> </head> <body> <?php echo '<p>Welcome to the Site!</p>'; // When running this script on a local database, the servername must be 'localhost'. Use the name and password of the web user account created earlier. Do not use the root password. $servername = "localhost"; $username = "webuser"; $password = "password"; // Create MySQL connection $conn = mysqli_connect($servername, $username, $password); // If the conn variable is empty, the connection has failed. The output for the failure case includes the error message if (!$conn) { die('<p>Connection failed: </p>' . mysqli_connect_error()); } echo '<p>Connected successfully</p>'; ?> </body> </html>

2. Use a web browser to test the script. Enter the name of the domain followed by phptest.php in the address bar. In the following example, substitute the actual name of the domain for example.com.

   http://example.com/phptest.php

3. The browser should display the web page without any errors. The page includes the text “Welcome to the Site!” and “Connected successfully”. If you see the “Connection Failed:” error message, review the SQL error information to debug the problem. See the Troubleshooting section for more information.

   

4. To increase security, remove the test script when testing is complete:

   sudo rm /var/www/html/example.com/public_html/phptest.php

Troubleshooting the LAMP Stack Installation

Although it is fairly straightforward to install a LAMP Stack on Ubuntu, it is a lengthy process. It is easy to miss a command or incorrectly spell a variable. The easiest way to quickly find errors is to keep testing as you proceed. For instance, visit the IP address of the Ubuntu system after configuring and enabling Apache.

Here are a few things to consider if the LAMP Stack is not working.

• Verify Apache is running: Even if Apache was initially working, it could have stopped or failed upon a reload. Confirm it is active and restart it using these commands:

  sudo systemctl status apache2
  sudo systemctl restart apache2

• Confirm the domain name and server IP address: If the HTTP request times out, it could be due to an incorrect address or domain name. Try the IP address first, then visit the domain name without any subdirectories or filenames. Ensure the DNS record for the domain has been set to the IP address of the Ubuntu system and the address has propagated. This can take up to one full day.

• Confirm the user information in MySQL: Ensure the database user has been added properly. Ensure the webdata database exists and the user has been granted all rights to it.

• Review all configuration files: Many errors are due to missing or incorrect variables in the configuration files. Ensure the DirectoryRoot variable in /etc/apache2/sites-available/example.com.conf matches the path of the domain directory. If this variable is incorrect, the browser might display the default Apache landing page, a 404 error, or an unexpected directory list.

• Verify the location of the test script: The test script must be located somewhere in the DirectoryRoot directory. The script should also be visible in the root directory of the domain.

• Confirm the user name and password used in the test script: Most database connection failures in the test script are due to an incorrect server name, password, or user name. Look for missing or incorrect information in the script.

• Review the Logs: The error logs for PHP are located at /var/log/php/error.log, while domain logs can be found at /var/www/html/example.com/logs/error.log. Examine the contents of both files and scan them for errors.

• Review the installation instructions: It is easy to overlook an important step. Incorrect user permissions or an uninstalled PHP module can cause confusing failures.

A Summary of How to Install a LAMP Stack on Ubuntu 22.04

The LAMP Stack consists of the Linux operating system, Apache web server, MYSQL RDBMS, and PHP programming language. These free and open source components power many modern web applications. The individual components are designed to work together and are easy to install and use.

The LAMP stack can be installed on Ubuntu 22.04 LTS using apt. After configuring the Apache web server, it is good practice to create a virtual host for the domain. To integrate the MySQL web server, create a new account to represent the web user. Additional PHP packages must be installed so Apache, PHP, and the database can communicate. The new installation can be tested using a short PHP test script that connects to the database. For more information about each LAMP Stack component, see the More Information section of this guide.

More Information

You may wish to consult the following resources for additional information on this topic. While these are provided in the hope that they will be useful, please note that we cannot vouch for the accuracy or timeliness of externally hosted materials.

• LAMP Stack Wikipedia page
• MySQL 8.0 Reference Manual
• MySQL Development Site
• Ubuntu Documentation
• Apache HTTP Server Documentation
• PHP Website
• PHP Documentation