network segregation of multiple instances

[seanshankus]

I'm confused on how to separate multiple instances on a linux minimserver. i understand how to install into different directories, but i'm not seeing how clients would "see" the different instances. Do you configure secondary instances on different ports? do you add additional IPs in the server, if so then do you how/where do you assign the secondary servers to different NICs/IPs? Basically how do you configure the additional instances to listen on resources that aren't already used by the first instance?