How are 2 IPs attached to one VPS?

Question

System administration

How are 2 IPs attached to one VPS?
And if I want to put some program on one of the IPs, should I connect to the specified IP in SSH and that's it?

Answer 1

And that's it.)

Answer 2

Urukhayy create a subdomain at the registrar and enter the IP address of your VPS. Create a host and that's it.

Answer 3

It is done in the settings of the server itself,
ip is configured on the node, and assigned to the desired VPS.
PS. I add: call the service provider =)

Answer 4

All this is solved by routing.
The entire entry in the routing table looks like this:
8.8.8.8/32 via 192.168.0.1 dev eth0 src 192.168.0.2
where:
8.8.8.8/32 - where
192.168.0.1 - through which gateway
eth0 - through which network card
192.168.0.2 - outgoing ip
And there is a default route for all "other" traffic.
Accordingly, all _outgoing_ connections (not initiated from outside, by a request to the httpd server listening to the second address, for example) will go from the first address, except for those addresses to which you create separate routes with a different src.
There are methods to overcome this for individual applications, but I'm not sure that with such questions you will be able to implement these methods.