What I want to do is to create a hostgroup (Linux Servers) that contain all hosts where something like vars.os=linux is defined. Whatever this variable is will be defined when I create a host. I'm getting tripped up at the "Assign where" dialog in Director.
Can somebody walk me through creating a hostgroup this way and also how to define the host with the os type variable? Extra points will be awarded for showing how to do something same with a service group!