Скачать или смотреть How to Install LAMP Server on Ubuntu 20.04 | Configure MySQL and Install PHPMyadmin

In the following video, it is explained how to install Apache, MySQL, PHP and configure them.

Before running any command run:
sudo apt-get update
sudo apt-get upgrade

Install Apache, MySQL and PHP in one command
sudo apt-get install lamp-server^

Configure MySQL:
sudo mysql_secure_installation
Note: Don't install password validator
then press y when prompted any question.

Install PHP Package Library "Composer"
sudo apt install composer

Install required PHP libraries to install phpmyadmin through composer
sudo apt install php-common php-zip php-xml php-curl

Then change directory into /var/www/html/ and give 777 or 755 permission to this directory. Now install phpmyadmin with below command:
composer create-project phpmyadmin/phpmyadmin