/etc/hosts and system entries

[Harry Hoffman]

Perhaps the best course of action is then to modify the local mail 
server (sendmail/postfix) to send out mail as the fully qualified domain 
name?

Then again, what to do in the situation of DHCP.

I guess that if mail is expected to be delivered locally then it's not a 
big deal.

but if you're running a bunch of servers you are going to want to send 
the emails to a central location.

I guess it sounds like a problem to solve outside of the hosts file


(sorry for the thinking out loud/rambling)


David Cantrell wrote:
> On Thu, 27 Sep 2007 10:10:42 -0400
> Simo Sorce <ssorce at redhat.com> wrote:
> 
>> On Thu, 2007-09-27 at 10:02 -0400, David Cantrell wrote:
>>> On Thu, 27 Sep 2007 09:59:16 -0400
>>> Harry Hoffman <hhoffman at ip-solutions.net> wrote:
>>>
>>>> So, /etc/hosts comes setup by default (i.e. after kickstart install)
>>>>
>>>> # Do not remove the following line, or various programs
>>>> # that require network functionality will fail.
>>>> 127.0.0.1               localhost.localdomain localhost
>>>>
>>>> I'm fairly certain to not too long ago (redhat-9 perhaps) the hostname 
>>>> of the system was also added to the localhost entry:
>>>>
>>>> 127.0.0.1  my.host.com my localhost.localdomain localhost
>>>>
>>>>
>>>> This had the distinct advantage that when apps (i.e. yum-updatesd) sent 
>>>> mail from the system via a mail host then address would appear as:
>>>> root at my.host.com  instead of root at localhost.com
>>>>
>>>> Am I remembering correctly, in terms of how I believe it used to be? If 
>>>> so, anyone know why it changed?
>>> https://bugzilla.redhat.com/show_bug.cgi?id=253979
>>>
>>> Fixed in rawhide.
>>>
>>> Why it changed...don't know, but I'll take the blame since I'm responsible for a lot of the network gutting and rewriting in anaconda.  Most likely a mistake on my part.
>>
>> Please, PLEASE, reconsider.
>> I've long hated this thing of assigning the hostname to 127.0.0.1, it
>> always breaks when using kerberos/winbindd as the hostname needs to
>> reflect the public facing ip.
>>
>> I personally think that Gnome is at fault here, is there any smarter way
>> to at least change the hostname mappingi hosts when the main network
>> interface gets an IP?
> 
> OK, now this is making sense as to why it changed before.  It's incorrect.
> 
> So here we are where a certain group of people want the hostname added to the 127.0.0.1 line and another group that doesn't.  I tend to agree with the latter, but I would rather explore this post F-8 than now.  Removing it, yet again, in rawhide after F-8 is released and any bugs that get opened we determine the program that's at fault and reassign the bug to that package.  It'll be annoying to users, but I think it's best to not have the hostname on the 127.0.0.1 line.
> 
>