Re: FQDN vs. domain in /etc/hosts
Stefan Schmidt <email@example.com> wrote:
> in my understanding the /etc/hosts file should contain an entry with the
> FQDN of the host.
> 18.104.22.168 hostname.domain.tld hostname
Yes, that's right.
> I would for simplicity prefer to use a domain name instead of a FQDN.
> 22.214.171.124 domain.tld hostname
> So both addresses are unambiguous. For what reason now would I need a
> FQDN? Why wouldn't a domain name suffice?
Typically, I see it that a domain refers to an entity, whereas a FQDN refers to a host or service within that entity. For your purposes the following sdhould be sufficient:
126.96.36.199 hostname.domain.tld hostname domain.tld
When resolving from name to IP, the first match will succeed. When
resolving from IP to name, the leftmost entry on the first line will be
considered the canonical name (hostname.domain.tld in this case).