On Thu, Apr 3, 2025 at 10:13 PM Michael Stone <mst...@debian.org> wrote: > > On Thu, Apr 03, 2025 at 12:59:19PM -0400, Jeffrey Walton wrote: > >I think the idea is, software can always use 127.0.1.1 to find the > >host's fully qualified domain name, without the need to know real IP > >address. (And what to do with multihomed hosts?) > > It literally doesn't matter. The host knows its own hostname, resolves > that, then does a lookup on the resolved IP to get the canonical name. > It does not care what the IP is, it can be 127.0.0.1, 10.0.0.1, 1.1.1.1, > whatever. The software does not assume it can get that information by > resolving 127.0.1.1, and if it did that would be a horrible bug because > there is no such guarantee. (Most OSs do not do things the way debian > does.)
Yeah, I'm going to lookup what Stevens has to say about the hosts file in TCP/IP Illustrated. I need to figure out where the confusion lies. Jeff
