Starting Oracle10g's database console

I must have offended the gods. My Oracle10g database is
running, I can connect using iSQL*Plus, but for the life of
me I can't start the Enterprise Manager Database Console.
Here's what happens when I try:

    oracle@gennick02:~> emctl start dbconsole
    TZ set to US/Eastern
    Unable to determine local host from URL 
EMD_URL=http://gennick02.gennick.com:/emd/main
    .
    oracle@gennick02:~>

This is a fresh install, running on a certified platform:
SuSE Linux Enterprise Server, Service Pack 3. Something is
screwed up here, but what?

Best regards,

Jonathan Gennick --- Brighten the corner where you are
http://Gennick.com * 906.387.1698 * mailto:jonathan@xxxxxxxxxxx

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