Re: Address 127.0.1.1

[Jeffrey Walton <noloader@gmail.com>]

On Fri, May 24, 2024 at 1:46 PM Greg Wooledge <greg@wooledge.org> wrote:
>
> On Fri, May 24, 2024 at 01:40:38PM -0400, Jeffrey Walton wrote:
> > On Fri, May 24, 2024 at 11:13 AM Paul M Foster <paulf@quillandmouse.com> wrote:
> > > 192.168.254.30  yosemite.mars.lan   yosemite
>
> > 127.0.1.1 is traditionally used for the fully qualified domain name
> > (fqdn). So I would expect to see 'yosemite.mars.lan', but not
> > 'yosemite'.
>
> I don't know why you would expect that.  What purpose would that serve?

Sorry I was not clear. I would expect that because 127.0.1.1 is
traditionally used for a fully qualified domain name, not a hostname.

> The goal here is for programs to be able to look up "the IP address"
> that belongs to $HOSTNAME.
>
> If the hostname is "yosemite", then "yosemite" must appear in the
> /etc/hosts file as an alias for whatever made-up FQDN is being used.
>
> This is what Paul has.  What Paul has looks quite reasonable to me.
> If 192.168.254.30 is in fact bound to an ethernet interface by a
> static configuration (e.g. /etc/network/interfaces) then I would also
> say it looks correct.
>
> > Also, fqdn's end in dot '.' to denote the top of the dns tree.
>
> Not in the /etc/hosts file, they don't.  You may be thinking of BIND
> configuration files.
>
> I've never IN MY LIFE seen trailing dots on hostnames in /etc/hosts.

Jeff