How to create 2 subdomains on the same ip?

Question

Debian

Good afternoon, the other day I decided to create a subdomain on one VDS, i.e. I also have a domain on the same vdsk and I need to create a subdomain for the forum. But after looking around on different sites, I did not find the article. And I want to ask you, How to create a subdomain on the VDS?

Answer 1

1) First you need a hoster who has a DNS server with your domain - register * .domen.com. (You can leave *, or you can register a subdomain)
2) Then catch this subdomain on the web server and redirect it to the forum folder.
Who is the web server??
In the comments, the toaster cuts bb codes.
Part of the config:

<VirtualHost *:80>
        ServerAdmin [email protected]
        DocumentRoot ""

        ServerName      forum.domen.ru
        ServerAlias     www.forum.domen.ru forum.domen.ru

<Directory /var/www/forum>
                Options Indexes FollowSymLinks MultiViews
                AllowOverride None
                Order allow,deny
                allow from all
        </Directory>
</VirtualHost>