LAN & DHCP/DDNS name

[Neil Dugan <debian@butterflystitches.com.au>]

Hi I have a LAN with DHCP and DDNS running, I have just installed Debian 
on one of the computers.  This new computer isn't specifying a name when 
doing the DHCP lookup, so the DDNS hasn't got a useful name for it to use.

How do I specify a name for the computer to use with DHCP?

There is a name in /etc/hosts
$> hostname
linux
$>

Regards Neil.