On Mon 19 Feb 2018 at 10:23:56 -0600, David Wright wrote: > On Mon 19 Feb 2018 at 12:28:03 (+0000), Jeremy Nicoll wrote: > > On Thu, 15 Feb 2018, at 16:21, Dan Purgert wrote: > > > > > > Later, once you understand how a local network works, you can come > > > > up with a theme. Or some convention that lets you identify the > > > > computer by its name. The name that you have chosen. > > > > Machine-naming makes sense to me - having done that with a variety > > of (blush) Windows machines in my LAN. I've toyed with versions of > > Linux, and used a few live-CD ones over the years, and I'm fairly sure > > that as well as being asked to supply a hostname I've also been asked > > to supply a domain value. > > > > What, on a home LAN, is that used for? > > Nothing, with the possible exceptions of: > > . avoiding this message at boot up: > Mon Feb 19 04:58:38 2018: [....] Starting MTA:hostname --fqdn did not > return a fully qualified name, > Mon Feb 19 04:58:38 2018: dc_minimaldns will not work. Please fix your > /etc/hosts setup. > > . satisfying a broken smarthost¹, > > . causing some discussion here. > > However, even though bug #504427 has never been answered, I don't > think I'm seeing this message any more except on wheezy (as above). > So here I have: > > $ cat /etc/mailname > alum
Debian's exim4 README says that mailname should be a FQDN. I find that useful for sending mail to "anotheruser". But mailname has nothing to do with domain as enquired about by Jeremy Nicoll. > $ head /etc/hosts > # /root/hosts-1-local-template > # List of local hosts. > # Adjust the two lines for this host when installing. > # Check the IPv6 lines occasionally because they change them. > > 127.0.0.1 localhost > 127.0.1.1 alum alum is the canonical_hostname. It is used by exim to HELO with. Many mail servers will not accept mail directly from you because it is not a FQDN. > 192.168.1.1 router > 192.168.1.2 roku2w > $ > > I've sometimes wondered what other people dream up as their > domainnames; that is, people who don't have a legitimate reason > to put something like example.com. Whatever is dreamt up as a domain name is put into /etc/hosts by the installer as 127.0.1.1 alum.dreamtup alum -- Brian.
