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Install LAMP on Ubuntu
Install Apache
sudo apt-get update
sudo apt-get install apache2
Also update settings for apache:
sudo ufw app list
sudo ufw allow in "Apache Full"
You can use /var/www folder for one site, but it will be good to have another folder in your home ~/ directory. So let's add these settings in your apache configs:
sudo nano /etc/apache2/apache2.conf