PHP is a programming language that is used to create web-based applications. It is essential to install the latest PHP on Ubuntu 20.04 to run the software written on it. In general, PHP is used to build e-commerce sites, blogs, API, and other applications. If you’re looking for a simple method on how to install PHP on Ubuntu and beyond, don’t look any further. The following guide will teach you how to install it quickly and effortlessly.

Installing PHP on Ubuntu

As with many other developer tools, PHP has several different release versions. As of the date of writing this article, PHP 7.4. 7.4 and 8.1 are currently supported and are the most popular versions of the software. When you buy a Linux server, it is crucial to install PHP 8 on Ubuntu 22 or any other version that you are using.

This command will install PHP using the apt program manager:

Sudo apt install php

On Ubuntu hosting 20.04, the option installs PHP 7.4, and Ubuntu 22.04 runs PHP Version 8.1.

If you’re trying to select the version you want to use PHP for either of the systems, you can follow the steps below to installing PHP 8 on Ubuntu 20 or any other version.

1. Install PHP using Apache on Ubuntu

If you’re using the Apache Web server, then install PHP using its Apache module. Below are the installation options for the two versions: PHP 7.4 as well as PHP 8.1.

1. Verify that you are running the most recent repository updates by typing the following command in the terminal window:

Sudo apt update && sudo apt upgrade

2. Install software-properties-common to help you manage distributions and independent software sources:

Sudo apt install software-properties-common

If your package is available, proceed.

3. After that, you should include ondrej/php PPA. This package offers several PHP versions for Ubuntu:

Sudo add-apt-repository ppa:ondrej/php

Once the PPA is loaded, hit enter to confirm that you have added the repository. There are a variety of PHP versions that are available in the PPA vary, starting at 5.6 through 8.2.

4. Update to be able to include new packages:

Sudo apt update

5. You can now install specific PHP versions. For instance:

• For installation of PHP 7.4, start the following command:

Sudo apt -y install php7.4

• For installing PHP 8 on Ubuntu 20, execute these commands:

Sudo apt -y install php 8.1

6. Verify the installation using the following:

php -v

2. Install PHP using Nginx on Ubuntu

The Nginx server doesn’t have native PHP processing capabilities. If you’re employing the Nginx server instead of Apache, then follow the instructions below to download PHP 7.4 as well as 8.1.

1. Type in the following command in the terminal window to verify you’re using the most up-to-date software:

Sudo apt update && sudo apt upgrade

2. Make sure to add to the Ondrej/php PPA to include a variety of PHP versions:

Sudo add-apt-repository ppa:ondrej/php

If the PPA information is loaded, click Enter to continue.

3. For installing PHP for Nginx, Use any of these commands:

• For PHP 7.4:

Sudo apt install php7.4-fpm -y

• For PHP 8.1:

Sudo apt install php8.1-fpm -y

4. When the installation is completed, you can start the Nginx service to apply the changes. In order to implement the changes, type in the following:

Sudo systemctl restart nginx

5. Next, you must enable PHP assistance by editing your server block. Start the server block by typing the command:

Sudo nano /etc/nginx/sites-available/default

6. Incorporate the following code into the block file on your server for Nginx to use PHP:

server{

# . . . existing configuration

location ~ .php$ {

include snippets/fastcgi-php.conf;

fastcgi_pass unix:/run/php/php<version>-fpm.sock;

}

}

7. Save the file, then close the file.
8. Then, restart Nginx using Ubuntu and load PHP again:

Sudo systemctl restart nginx

Sudo systemctl reload php<version_number>-fpm

Installing PHP Modules on Ubuntu

To install further PHP modules, you must use the syntax below:

Sudo apt install php<version>-<package_name>

For instance:

Sudo apt install php8.1-posix

If you prefer to install multiple modules at the same time. For instance, to install the components such as MySQL, zip and Bcmath in PHP 7.4 then, you’d use:

Sudo apt install php7.4-{mysql,zip,bcmath}

To display the loaded PHP modules, use the command:

php -m

How to Uninstall PHP on Ubuntu

To remove PHP from Ubuntu, Follow the steps in the following:

1. Enter the following command into the terminal:

Sudo apt-get purge php<version>

For instance, if you have installed PHP 7.4 FPM, you can run the command below:

Sudo apt-get purge php7.4-fpm

2. To remove the orphaned packages, use the following command:

Sudo apt-get autoremove

3. Then, you should check your PHP version to ensure that the uninstall was successful:

php -v

If the output doesn’t display the version, then the uninstall was not able to remove everything properly.

Conclusion

If you’ve read this article, then you know how to install PHP on Ubuntu hosting. In this article, we discussed how to install the latest PHP on Ubuntu 20.04 and other versions using Apache and Nginx in the Ubuntu 20.04 as well as 22.04 system.

The most important thing to keep in mind is that PHP operates in conjunction with an existing server, which means you must install PHP specifically on the server software. You can also download a stable version of PHP from one of the Ubuntu software repositories.

Comparing PHP Versions for Ubuntu

When installing PHP on Ubuntu 20.04 or 22.04, it’s crucial to choose the right version for your needs. PHP 7.4 is the default for Ubuntu 20.04, offering stability and performance, while PHP 8.0, available in Ubuntu 22.04, provides improved performance and new features. Ensure compatibility with your applications before selecting a version.

Step-by-Step PHP Installation on Ubuntu

• Update your package list: sudo apt update
• Install PHP: sudo apt install php
• Verify the installation: php -v
• Install additional PHP modules as needed: sudo apt install php-mysql php-xml php-curl
• Restart your web server to apply changes: sudo systemctl restart apache2 or sudo systemctl restart nginx

Common PHP Modules and Their Uses

FAQ

What is the default PHP version on Ubuntu 20.04?

Ubuntu 20.04 comes with PHP 7.4 as the default version. It’s a stable release that supports most applications.

How can I switch PHP versions on Ubuntu?

You can switch PHP versions using the update-alternatives command. Install the desired PHP version, then configure it with sudo update-alternatives --set php /usr/bin/php8.0 for PHP 8.0, for example.

Why is PHP not working after installation?

Ensure that your web server (Apache or Nginx) is properly configured to use PHP. Check for missing PHP modules or configuration errors in the server’s error logs.

For more advanced server configurations and hosting solutions, explore our VPS hosting options to optimize your server environment.

Optimizing PHP Configuration on Ubuntu

Once PHP is installed on your Ubuntu system, optimizing its configuration is crucial for performance and security. By default, PHP comes with a configuration file, php.ini, which you can modify to suit your needs. It’s typically located in /etc/php/7.x/cli/php.ini or /etc/php/7.x/apache2/php.ini depending on your setup.

Key configuration parameters to consider include:

• Memory Limit: Adjust the memory_limit setting to ensure your PHP applications have enough memory to run efficiently. For most applications, 128M is a good starting point.
• Max Execution Time: The max_execution_time setting limits how long a script can run. Setting it to 30 seconds is generally sufficient, but adjust based on your application needs.
• Error Reporting: During development, set error_reporting to E_ALL to catch all errors. In production, you might want to log errors instead of displaying them to users by setting display_errors = Off and log_errors = On.

Installing and Managing PHP Extensions

PHP extensions provide additional functionality to your applications, allowing you to connect to databases, manipulate images, and more. On Ubuntu, you can easily install PHP extensions using the apt package manager.

To list available PHP extensions, use the command:

sudo apt-cache search php-

To install a specific extension, such as the MySQL extension, use:

sudo apt install php-mysql

After installation, it’s important to restart your web server to apply changes:

sudo systemctl restart apache2

Managing installed extensions can be done using the php -m command, which lists all loaded extensions. To disable an extension, locate its configuration file in /etc/php/7.x/mods-available/ and remove the symlink in /etc/php/7.x/cli/conf.d/ or /etc/php/7.x/apache2/conf.d/.

Troubleshooting Common PHP Installation Issues

While installing PHP on Ubuntu is generally straightforward, you may encounter issues that require troubleshooting. Common problems include dependency errors, version conflicts, and incorrect configurations.

If you encounter a dependency error during installation, try updating the package list and upgrading all packages:

sudo apt update && sudo apt upgrade

For version conflicts, ensure that you’re installing a compatible PHP version for your Ubuntu distribution. You can specify the PHP version during installation, for example:

sudo apt install php7.4

Incorrect configurations can lead to PHP not functioning as expected. Check the php.ini file for typos or incorrect settings, and verify the PHP version with:

php -v

Comparing PHP Versions and Choosing the Right One

Choosing the right PHP version is essential for application compatibility and performance. Each PHP version introduces new features, improvements, and deprecations, impacting how your applications run.

As of now, the most commonly used versions are PHP 7.4, 8.0, and 8.1. PHP 7.4 offers stability and compatibility with most applications, while PHP 8.0 and 8.1 provide performance improvements and new features like JIT compilation and union types.

When selecting a PHP version, consider your application’s requirements, compatibility with existing code, and the support lifecycle of each PHP version. Regularly check for updates and plan for upgrades to maintain security and performance.

Understanding PHP Versions and Compatibility

Before diving into the installation process, it’s crucial to understand the different PHP versions available and their compatibility with Ubuntu. PHP is regularly updated to enhance performance and security, so ensuring you have the latest stable version is beneficial. Ubuntu 20.04 and 22.04 support multiple PHP versions, including 7.4, 8.0, and 8.1. Each version offers unique features and improvements, so selecting the right version for your application is essential.

To check the available PHP versions, you can use the package manager with the following command:

sudo apt-cache show php

This command will list all the PHP versions available in the Ubuntu repositories. It’s advisable to choose a version that aligns with your application’s requirements and is supported by your web application framework. For instance, if you are running a Laravel application, ensure the PHP version is compatible with the Laravel version you intend to use.

Configuring PHP for Optimal Performance

Once PHP is installed, configuring it for optimal performance is the next critical step. PHP configuration is primarily managed through the php.ini file, which contains directives that control PHP’s behavior. Adjusting these settings can significantly impact the performance and security of your applications.

Key settings to consider include:

• Memory Limit: Increase the memory limit to accommodate resource-intensive applications. This can be done by setting memory_limit = 256M or higher in the php.ini file.
• Max Execution Time: Set the max_execution_time to a reasonable value to prevent scripts from running indefinitely, potentially using up server resources. A typical setting is max_execution_time = 30.
• Upload File Size: Adjust upload_max_filesize and post_max_size to allow larger file uploads if necessary, especially for applications handling media files.

After making changes to the php.ini file, restart your web server to apply the new configurations:

sudo systemctl restart apache2

Common Issues and Troubleshooting Tips

Installing PHP on Ubuntu can sometimes lead to unexpected issues. Here are some common problems and their solutions:

• PHP Not Recognized: If PHP commands are not recognized, ensure that PHP is correctly installed and the /usr/bin/php path is included in your PATH environment variable. You can verify this by running which php.
• Apache Not Serving PHP Files: If Apache is not processing PHP files, ensure that the PHP module is enabled with sudo a2enmod php and restart Apache.
• Permission Issues: Sometimes, PHP scripts may not execute due to permission issues. Ensure that the web server user has the necessary permissions to read and write in the directories where PHP scripts are located.

If issues persist, reviewing the Apache error logs can provide insight into the problem:

sudo tail -f /var/log/apache2/error.log

Comparing PHP with Other Scripting Languages

PHP is a popular scripting language, but it’s essential to understand how it compares to other languages like Python and Ruby, especially when choosing the right tool for your project. PHP is known for its ease of use, extensive documentation, and a large community, making it an excellent choice for web development.

When compared to Python, PHP is generally faster in executing web pages due to its web-centric design. However, Python offers a more extensive range of libraries for various applications beyond web development, such as data analysis and machine learning. Ruby, on the other hand, is praised for its elegant syntax and the powerful Ruby on Rails framework, which accelerates the development process for web applications.

Ultimately, the choice between PHP and other scripting languages depends on your project requirements, existing infrastructure, and the skill set of your development team. Each language has its strengths and ideal use cases, so it’s worth considering these factors when deciding on the best technology for your project.

When securing Linux systems, a password is the first line of defense. Although passwordless is an excellent alternative, you may just buy Linux VPS Server; we recommend that you use a password to protect your VPS.

Linux users can change their passwords frequently to strengthen security and make it harder for hackers to break into the system.

Linux provides the “passwd utility” to modify a user account password. Once you buy Linux server, the server itself stores any information related to the encrypted user’s password and password-related details in the “/etc/shadow/” file. Normal users can only change their passwords. You can change the passwords of other users if you’re a root user or have sudo access.

When changing your password, ensure that it is strong and unique. This password must meet the requirements for Linux passwords. A strong password will protect your account against theft and unauthorized access. Strong passwords should have 16 characters, including one uppercase, one lowercase, and one special character. To protect your password from hackers and other unwelcome access, it is a good practice to update it regularly.

How to Change Password in Linux

Once you buy a Linux server, you will be given an email regarding your credentials. By accessing your root, you can change the user password via SSH is the first step. In our previous guide, we discussed how to access Linux using PuTTy.

Changing a Linux user’s password in one command line can be achieved by using the following command:

Keep in mind that only if you are logged in at the root, you can change the user password. If you are not logged in, you will have to enter your password.

It will then prompt you to enter your new password twice in the command line.

You should receive this message to confirm that your password has been changed.

How to Change Password in Linux for Other Users

The passwd command in Linux can also be used to change passwords for other accounts in the system. Follow these steps to do this:

1. Log in as the root user. The passwd command is followed by the user’s name.

2. This is an example of how to change the password for a user named Admin.

3. The terminal will then prompt you to enter your new password twice more.

Enter new UNIX password:

Retype new UNIX password:

4. After you have changed the password for the other user, use the Passwd; the following output will be generated by the command:

passwd: password updated successfully

Conclusion

In this article, we discussed how to change passwords in Linux VPS Server. Linux is the most secure OS. Users can set a password to protect their accounts. Normal people can only set the password to their working accounts. To change the password of another Linux user, you will need sudo access or root privileges. The Linux administrators will manage the accounts of users and set and change passwords.

Frequently Asked Question around Changing Passwords in Linux VPS Server

1. Can we change passwords in Linux?

To change the user password, both Linux and UNIX-like systems use passwd.

2. how do I change the password on the Linux server?Simply connect to your server using the PuTTy control panel and use the passwd command; you can change the Linux user password.

3. How do I find my Linux server password?

Each user account is stored in the password file /etc/passwd. The password hash information and optional aging information are stored in the /etc/shadow files.

4. Which command is used to change passwords in Linux?

The passwd command can be used to change passwords in Linux.

5. How do I change my Linux password without knowing?

Login as root and type sudo. You can then create a new password by using passwd [user]. You can also copy any encrypted password from /etc/shadow and transfer it to this user.