How to install Multiple Websites host on ubuntu server AWS and connect our domain name server I am starting with install apache server I am using AWS ec2-Machine
Installing Apache webserver on ubuntu server
apt install apache2

changing directory cd command
cd /var/www/

Creating two apache root directories for our website server
mkdir -p ctfplayer.com/public_html
mkdir -p jameshacker.me/public_html

Changing Permission our Web directories
chmod -R 755 ctfplayer.com/
chown -R www-data:www-data ctfplayer.com/
chmod -R 755 jameshacker.me/
chown -R www-data:www-data jameshacker.me/

cd ctfplayer.com/public_html
Creating an index.html for testing purpose
vi index.html

<html>
<head>
<center><h1>ctfplayer.com</h1>
<title> ctfplayer</title>
<h3> This is our First Website for demo </h3></center>
</head>
</html>

I am copying the index.html file our second website root directory
cp index.html /var/www/jameshacker.me/public_html/
cd /var/www/jameshacker.me/public_html
ls
Editing our second website default index.html file
vi index.html

<html>
<head>
<center><h1>jameshacker.me</h1>
<title> JamesHacker</title>
<h3> This is our Second Website for demo </h3></center>
</head>
</html>

creating a virtual-host our websites I am copy 000-default.conf file ctfplayer.com.conf and jameshacker.me.conf
cd /etc/apache2/sites-available/
cp 000-default.conf ctfplayer.com.conf
cp 000-default.conf jameshacker.me.conf
Configure Virtual Host in Apache to host multiple domains
now configure our virtual host in apache configuration file Go to the apache conf location. ( in default installation – you will find it here /etc/apache2/sites-available
I am copying the default 000-default.conf to our domain name ctfplayer.com.conf and again copy the default 000-default.conf file to our second domain name ctfplayer.com.conf
Editing our first virtual host file ctfplayer.com.conf and add server name and our root directory
vi ctfplayer.com.conf

ServerName ctfplayer.com
ServerAlias www.ctfplayer.com
ServerAdmin [email protected]
DocumentRoot /var/www/ctfplayer.com/public_html

Editing our second virtual-host file jameshacker.me.conf
vi jameshacker.me.conf

ServerName jameshacker.me
ServerAlias www.jameshacker.me
ServerAdmin [email protected]
DocumentRoot /var/www/jameshacker.me/public_html

enable our virtual-host configuration file
sudo a2ensite ctfplayer.com.conf
sudo a2ensite jameshacker.me.conf

now disable our default apache server configuration file 000-default.conf remember after disabling apache2 default configuration file default host is not working
sudo a2dissite 000-default.conf
after creating and enable our virutal-host we need to restart our apache2 server
service apach2 restart

Configure our domain DNS record connection our server IP address
Go to your domain name provider and log in your account my case I am using Godaddy go to the Domains section and you see your domain now changing our DNS record for connecting our hosting server

After click DNS we see our DNS Records now adding our hosting IP address remember to delete your old A Type records and click the add button choose to Type-A Records and Host section @ and Point to address (your hosting IP address and TTL Value is default and save button

Same configuration our second domain DNS record

Add A record (associates a name with an IP address) server address and click save button to save our records file

checking our Website is connect properly to our hosting server
ctfplayer.com Checking our first Website in the web browser and we see our first web site default web page index.html

jameshacker.me Checking our Second Website in the web browser and again we see our default index.html file

Joomla setup apache server read here