I'd like the small set of systems I'm fixing to have proper fully
qualified hostnames for hte command "hostname". But different of the
systems are doing different things, in an environment where the
machines got moved from one domain to another. It's not a big problem,
because it's an internal domain, but this is forcing me to continue
using /etc/hosts instead of normal internal DNS.

Machine A responds to "hostname" with a.olddomain.com.
Machine B responds to "hostname" with b.oldommain
Machine C responds to "hostname" with c.

In all cases, I want to change them to be "[machine].newdomain.com".
I've tried going through the scoadmin tools, but am not easily finding
where to set this. Is it just editing /etc/default/tcp and ebooting?