Hi,
I am newbie here, so, I have domain question.

debian + virtualmin, when i created servers in virtualmin I assigned 3 different IPs to 3 different servers. I did the same at VPS hosting website, I created DNS zones.

for example:

mysite1.com has IP 5.220.100.101
mysite2.com has IP 5.220.100.102
mysite3.com has IP 5.220.100.103

so, it is OK in virtualmin and VPS hosting site, but when I created wordpress sites, all 3 got the same IP: 5.220.100.101, it means if I try to type http://5.220.100.102/~mysite2.com
I don't get anything,

now I visited domain website and I understood I can not change A input to IP 5.220.100.102 than I must use for all 3 sites the same basic IP: 5.220.100.101
I saw the whole problem when i wanted to change IP at domain register. I logged in and I must add only basic IP.

by the way, all 3 wordpress websites are created in
/home/mysite1.com/public_html
/home/mysite2.com/public_html
/home/mysite3.com/public_html

it means virtualmin created users as I wanted, but how to give them different IPs? in virtualmin it is different but not in reality.

for example in Virtualmin - server configuration - dns records:
mysite2.com A - IPv4 Address 5.220.100.102
at virtualmin server mysite3.com is also: mysite3.com A - IPv4 Address 5.220.100.103

but in reality it is working only if I type in web browser: 5.220.100.101/~mysite2.com

so, how to assign second IP to /home/mysite2.com?

I said to friend to buy 3 IP dresses but now I don't know how to set it up for him, to have separated IP for each domain/wordpress site. in wordpress admin backend is also written basic address: 5.220.100.101/~mysite2.com
I had to install wordpress like that before I change IP at domain register (I migrate sites for him, it is all OK except I don't know how to assign 3 different IPs).

additional information:
I checked now and /var/lib/bind/mysite2.com.hosts and everything is OK, there is assigned IP, 5.220.100.102, and not basic IP.
it is also correct for mysite3.com, 5.220.100.103.

I checked and /etc/apache2/sites-available/
it is OK: <VirtualHost 5.220.100.102:80 then there is IPv6address:80

I guess you better work with different name based virtual hosts instead of using different ips. You need several network cards for 3 IPs, don't you?
But I don't know Virtualmin.

Could always try virtual interfaces. These show up the same as the base ethernet interface, but with a number attached( such as "eth0:1", "eth0:2") once created they work exactly like a different physical interface would.

The file you want to find is the httpd.conf file for Apache web server. Towards the bottom of the file different virtual web servers can be configured for them to run on application initialization.

hosting company answered to me that I should assign additional IPs to the server, in etc/network/interfaces

after that restarting network (/etc/init.d/networking restart), then check it with ifconfig and then configuring Domains at domain register.

I did it and now it is working, I can use all IPs to ssh login to the server.

problem is only when I uploaded new wordpress, I can not start installation, I get download file instead of installation wizard.
now I try to find solution for that, apache <directory is OK:

any idea why wp installation is not accessible?
when i type IP address IP 5.220.100.102
I get some file to download and it is the same when I type: IP 5.220.100.102/~mysite2.com

this is content of that file:

Current WP installs have an upgrade option on the admin area that will do it for you.