Apache2

Web Server for linux.
Paths:
/etc/apache2/sites-available
/etc/apache2/sites-enabled (symbolic links to sites-available/*.conf files)

Virtual Hosts

Apache allows to have multiple web sites on the same server. To do this go to sites-available and create a
.conf file for each host you whant containing the following:

 <VirtualHost *:80>
    ServerAdmin rafael@herrerosolis.com
    DocumentRoot /var/www/webfolder
    ServerName www.yourwebpagename.com
    ServerAlias www.yourwebpagename.com

    ErrorLog /var/www/yourwebfolder/logs/error.log
    
    # Posible values include: debug, info, notice, warn, error, crit.
    # alert, emerg.

    CustomLog /var/www/yourwebfolder/logs/access.log combined

 </VirtualHost>

You should also enter in your domain administration panel and create the CNAMES to redirect trafic
to the public ip of this server

Authentication

Create user account with:

htpasswd -c /usr/local/apache/passwd/passwords rbowen

Protect with the directory directive:

<Directory "/usr/local/apache/htdocs/secret">
    AuthType Basic
    AuthName "Restricted Files"
    # (Following line optional)
    AuthBasicProvider file
    AuthUserFile "/usr/local/apache/passwd/passwords"
    # Require user rbowen
    Require valid-user
</Directory>

See more options at: https://httpd.apache.org/docs/2.4/es/howto/auth.html