FQDN (hostname -f)

[eundfc6]

Folks,

I would like to setup Domain Name on my FC6 box. I'm using DHCP.
Where do I have to add Domain Name? Which file?

Thanks,
FC

[eundfc6]

According to this: http://www.die.net/doc/linux/man/man1/domainname.1.html
'hostname --fqdn' set by 'resolver'(/etc/resolv.conf), but I'm using DHCP...