https://www.digitalocean.com/community/tutorials/how-to-install-linux-apache-mysql-php-lamp-stack-on-ubuntu-20-04

sudo apt update
sudo apt upgrade

sudo apt install apache2

sudo ufw app list

Available applications:
  Apache
  Apache Full
  Apache Secure
  OpenSSH

sudo ufw status

Status: active

To                         Action      From
--                         ------      ----
OpenSSH                    ALLOW       Anywhere                                
Apache                     ALLOW       Anywhere                  
OpenSSH (v6)               ALLOW       Anywhere (v6)                    
Apache (v6)                ALLOW       Anywhere (v6)

sudo apt install mysql-server

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

sudo chown -R $USER:$USER /var/www/your_domain
sudo nano /etc/apache2/sites-available/your_domain.conf

<VirtualHost *:80>
    ServerName your_domain
    ServerAlias www.your_domain
    ServerAdmin webmaster@localhost
    DocumentRoot /var/www/your_domain
    ErrorLog ${APACHE_LOG_DIR}/error.log
    CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>

sudo chown www-data:www-data /var/www/html/ -R