I wonder if linux comannd "dnsdomainname" which returns domain name of server is important and reliable argument and can't be changed to something like "blablabala" and domain name still works.
Let's say I want to write redirecting script for customer. This script use "dnsdomainname" as an argument. Can I rely on it ? Is it possible that customer set dnsdomainname or hostane to something meaningless like "myserver" or "blbablabla" and his domain name still works (can access website through domain name and so on...) ?