Re: [gentoo-user] Why do we add the local host name to the 127.0.0.1 / ::1 entry in the /etc/hosts file?

[Andrew Udvare <audvare@gmail.com>]

> On 2021-02-21, at 17:23, Grant Taylor <gtaylor@gentoo.tnetconsulting.net> wrote:
> 
> Hi,
> 
> I'm reading Kerberos - The Definitive Guide[1] and it makes the following comment:
> 
>> And to make matters worse, some Unix systems map their own hostname to 127.0.0.1 (the loopback IP address).
> 
> This makes me think that the local host name /shouldn't/ be included in the 127.0.0.1 (or ::1) entry in the /etc/hosts file.
> 
> However, according to the Gentoo AMD64 Handbook[2], we are supposed to add the local host name to the 127.0.0.1 (and ::1) entry in the /etc/hosts file.
> 
> Will someone please explain why the Gentoo AMD64 Handbook ~> Gentoo (at large) says to add the local host name to the 127.0.0.1 (or ::1) entry in the /etc/hosts file?  What was the thought process behind that?

The thought process is the same as the guide you are reading. https://www.oreilly.com/library/view/kerberos-the-definitive/0596004036/ch04s03.html

It says in the last paragraph on this page that the /etc/hosts file should have the '127.0.0.1 localhost <not-FQDN>' (last part is definitely optional) and then that the next entry should have the outer IP address mapped to the FQDN.

-- 
Andrew