Fwd: problem due to hostname change

[Eric Anderson]

Pietro Cerutti wrote:
> Hi Hackers,
> I posted this on freebsd-questions, but couldn't find a solution...
> 
> Maybe here....
> 
> Thank you!
> 
> 
> Please: don't Cc me, I'm on the list!
> 
> 
> ---------- Forwarded message ----------
> From: Pietro Cerutti <pietro.cerutti at gmail.com>
> Date: Thu, 17 Mar 2005 15:04:45 +0000
> Subject: Re: problem due to hostname change
> To: Lowell Gilbert <freebsd-questions-local at be-well.ilk.org>
> Cc: FreeBSD <freebsd-questions at freebsd.org>
> 
> 
> On 17 Mar 2005 09:57:26 -0500, Lowell Gilbert
> <freebsd-questions-local at be-well.ilk.org> wrote:
> 
>>Pietro Cerutti <pietro.cerutti at gmail.com> writes:
>>
>>
>>>Hi list,
>>>my computer is not part of a domain, and so I had set my hostname to
>>><old_hostname>.
>>>Now I changed it in rc.conf to <new_hostname>:
>>>
>>>~> cat /etc/rc.conf | grep hostname
>>>hostname="<new_hostname>"
>>>~>
>>>
>>>I rebooted, but my pc is still somewhere configured to be called <old_hostname>.
>>>First of all, when the pc boots, I see this in dmesg:
>>>
>>>FreeBSD 5.4-PRERELEASE #10: Wed Mar  9 15:40:46 UTC 2005
>>>    <my_name>@<old_hostname>:/usr/obj/usr/src/sys/GAHR
>>
>>That's not a problem; all it means is that's who built the kernel.  It
>>doesn't get used for *anything* other than printing that message.
>>
>>
>>>Then, when I try to start apache, I see this in my
>>>/var/log/httpd-error.log, and apache won't start:
>>>
>>>[Thu Mar 17 13:29:11 2005] [alert] mod_unique_id: unable to
>>>gethostbyname("<old_hostname>")
>>
>>You must have put the old hostname into Apache's configuration
>>explicitly.  You will need to change it by hand.  The configuration
>>file is (by default, as installed from the port)
>>/usr/local/etc/apache/httpd.conf.
> 
> 
> No, this is not the problem. I searched in httpd.conf but I didn't
> find anything concerning my <old_hostname>.
> 
> I even deinstalled & deleted the configuration files & reinstalled apache.
> 
> Don't forget this:
> FreeBSD 5.4-PRERELEASE #10: Wed Mar  9 15:40:46 UTC 2005
> <my_name>@<old_hostname>:/usr/obj/usr/src/sys/GAHR
> 
> Here I have my <old_hostname> too.
> 
> 
>>>My question is: how can I change my hostname to <new_hostname> safely,
>>>in a way that the <old_hostname> is not used anymore in any part of
>>>the OS?
>>
>>Changing rc.conf is enough for anything that was configured
>>automatically.
> 
> 
> It should be so, but it actually isn't.
> 
> If you changed some other configuration by hand, you
> 
>>will need to change it again by hand.  Note that if you had not added
>>your hostname to httpd.conf, Apache would have used the system
>>hostname by default (I believe; I haven't actually checked this
>>recently).
> 
> 
> I'm sure I didn't set my <old_hostname> anywhere else than in rc.conf


What about /etc/hosts?  Maybe try:

grep oldhostname /etc/*


Eric




-- 
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Eric Anderson        Sr. Systems Administrator        Centaur Technology
I have seen the future and it is just like the present, only longer.
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