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As per the this question's title, hostname doesn't return domain info and domainname returns empty. I want to find out the full machine and domain for the machine I'm using (Mac OS X 10.5.8). How can I go about doing this? Tks.

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host `hostname`

will have what you are looking for. To extract just the fully qualified domain name

host `hostname` | sed 's/\([^ ]*\)\ .*/\1/'

Of course; this only really works if you've applied the AlwaysAppendSearchDomains fix to mDNSResponder. In some cases, for example you are behind a VPN, no amount of coaxing that I've found will give you the domain name if the infrastructure has not been able to set it for you.

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Probably you don't have a domain defined right now

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  • Thanks for the prompt reply Dominik. I haven't got a hand in the network itself but is there anything I can do as a client to get that domain to set itself?
    – Anonymous
    Mar 18, 2010 at 19:30
  • Did you get your IP by DHCP ?
    – Dominik
    Mar 18, 2010 at 19:31
  • Yeap. IP is auto-assigned via DHCP. If I do a DNS lookup using $ host hostname it does show me the full domain.
    – Anonymous
    Mar 18, 2010 at 19:36
  • In that last comment it hostname should be wrapped in backticks.
    – Anonymous
    Mar 18, 2010 at 19:48

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