hostname vs domainname

[Couannette]

what's your /etc/host.conf and /etc/hosts ?

Remco Lubbers wrote:
> Hi there,
> 
> according to /etc/init.d/hostname I am supposed to set a domainname via
> /etc/domainname, telling me no domainname has been set if I don't during boot.
> I would think that this means I should put solely my hostname in /etc/hostname,
> but if I do so e.g. Postfix starts complaining about not having a fully
> qualified domainname to work with.
> 
> so if I have to put server.domain.tld in /etc/hostname, what is the additional
> use of /etc/domainname?
> 
> Can somebody please enlighten me?
> 
> TIA!
> 
> Remco
>