1 - install apache2:
sudo apt update
sudo apt install apache2

2 - Managing apache2:
- to stop web service
sudo systemctl stop apache2

- to start web service:
sudo systemctl start apache2

- to restart service:
sudo systemctl restars apache2

- reload Apache configuration
sudo systemctl reload apache2

- to stop starting automatic apache when pc boots up:
sudo systemctl disable apache2

- to re-enable service to start up at boot:
sudo systemctl enable apache2

3 - Setting up virtual host
- create own folder where page will be contained:
sudo mkdir /var/www/ownfolder
sudo chown -R $USER:$USER /var/www/ownfolder
sudo chmod -R 755 /var/www/ownfolder

- create virtual host files:
sudo nano /var/www/ownfolder/index.html

Write inside index.html:
Hello World!!

sudo nano /etc/apache2/sites-available/ownfolder.conf

Write inside ownfolder.conf:

<VirtualHost *:80>
	ServerName ownfolder
	ServerAdmin my_email@my_server_email.com
	DocumentRoot /var/www/ownfolder
	ErrorLog ${APACHE_LOG_DIR}/error.log
	CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>

sudo nano /etc/apache2/apache2.conf

include this line to file end:

ServerName 127.0.0.1

- Ready to activate our own virtual server:
sudo a2ensite ownfolder.conf
sudo a2dissite 000-default.conf
sudo apache2ctl configtest
sudo systemctl reload apache2