127.0.1.1 line, was Re: chrome web browser worthless

[David Wright <deblis@lionunicorn.co.uk>]

On Wed 02 Aug 2023 at 16:00:24 (-0400), gene heskett wrote:
> On 8/2/23 15:15, Brian wrote:
> > On Wed 02 Aug 2023 at 14:52:26 -0400, gene heskett wrote:
> > > On 8/2/23 14:26, Brian wrote:
> > > > No - that isn't the way it works. Give what is asked for, not a censored
> > > > version that suits you.
> > > > 
> > > ok, same cat in full:
> > > gene@bpi52:~$ cat /etc/hosts
> > > 127.0.0.1       localhost
> > > 192.168.71.1    router.coyote.den	router
> > > 192.168.71.3    coyote.coyote.den       coyote
> > > 192.168.71.4    sixty40.coyote.den      sixty40
> > > 192.168.71.7    vna.coyote.den          vna
> > > 192.168.71.8    rock64v2.coyote.den     rock64v2
> > > 192.168.71.9    bpi51.coyote.den        bpi51
> > > 192.168.71.10   go704.coyote.den        go704
> > > 192.168.71.11   bpi53.coyote.den        bpi53
> > > 192.168.71.12   bpi54.coyote.den        bpi54
> > > 192.168.71.13   rpi4.coyote.den         rpi4
> > > 192.168.71.21   scanner.coyte.den       scanner
> > > 192.168.71.22   rock64.coyote.den       rock64
> > > 192.168.71.23   bpi52.coyote.den        bpi52
> > > 192.168.71.25   tlm.coyote.den          tlm
> > > 192.168.71.50   dddprint.coyote.dn      dddprint
> > > 31.184.194.81   Sci-Hub.se
> > 
> > Where is the line with 127.0.1.1? Debian always provides that.
> > 
> True, but I've never seen a description of what that does or what its
> for.

AIUI it means that your hostname is always resolvable and reachable
regardless of whether the network is yet configured.

I assume the listing above was taken off one of the machines in
the list. I assume you can always ping localhost and 127.0.1.1
(or, for that matter, 127.any.any.any) even if you remove its
network cable (to save downing the interface). However, I would
expect that you can't ping foo (where foo is the hostname) under
the same circumstances (whereas I can).

I have no idea whether it has anything to do with your problem;
I kind of doubt it. I thought you'd solved that anyway, by
typing in the full URL (and then bookmarking it, I hope).

> So I've removed it from every machine here because its out of
> scope for 127.0.0.1.

I'm not sure what you mean by scope. 127.0.0.0 is /8 isn't it?

Cheers,
David.