Re: /etc/hosts
6/21/2002 8:59:25 PM, Marc Barnett <marc@solid.net> wrote:
>On Fri, Jun 21, 2002 at 08:56:56PM +0100, john gennard wrote:
>> The only line I have now in the file is:-
>> 127.0.0.1 <machine name>.clara.co.uk <machine name>
>
>Change this to:
>
>127.0.0.1 localhost <machine name>.clara.co.uk <machine name>
>
>or alternatively
>
>127.0.0.1 localhost
><your ip> <machine name>.clara.co.uk <machine name>
>
>> Trying to ping localhost now says 'unknown host host' and pinging
>> localhost says 'unknown host localhost' and this was not the case
>> before I changed /etc/hosts. I've never understood how loopback
>> works and have assumed 127.0.0.1 was how all machines refer to
>> themselves.
>
>127.0.0.1 does always refer the machine to itself[1], but humans use
>"localhost". Such translations need to occur in the /etc/hosts file
>(or in DNS, but that's secondary to your problem)
>
>> After a couple of years being mystified by FQDN's I thought at long
>> last I did understood - now I just don't know.
>
>Fully Qualified Domain Name, it's the name used to get your IP from
DNS
>without using or requiring local assumptions.
>
>For instance "www.debian.org" is "klecker.debian.org" and both are
the
>FQDN. "klecker" is enough to get to the machine from itself or other
>machines configured to assume "debian.org" but the full name is
required
>to get to it from the rest of the world.
>
>1: Assuming you have a lo device and it's configured, etc, etc... Too
>much complication doesn't do anything but muddle the answer.
>
>
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Sorry, real newbie and don't get it still. I'm on a dialup to ISP
and have dynamically assigned FQDN. If I enter my email name with
the ISP's name and domain I'm sure it won't be appreciated. If I enter
in etc/hosts: 127.0.0.1 fakename. org
-then my email "From:" line is going to read "fakemail.com" isn't
it? And DNS will not be the wiser. (I can reach the list now because
I'm running from NT; can receive mail in Debian Elm but not reach the
outer world without a valid FQDN.)
Likewise in Exim.conf: what is my:
primary_hostname=
qualify_domain=
qualify_recipient=
local_domains=
?????????
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Prescott Smith prescott@interlinklc.net
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