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