Relevant files (slightly anonymized):
heinzi@d2:~$ cat /etc/hostname
d2
heinzi@d2:~$ cat /etc/hosts
127.0.0.1 localhost
<myexternalip> d2.<myname>.at <myname>.<myprovider>.at <myname>
# The following lines are desirable for IPv6 capable hosts
::1 localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
This output is correct:
heinzi@d2:~$ hostname
d2
heinzi@d2:~$ hostname --all-fqdns
d2.<myname>.at
But this I don't understand:
heinzi@d2:~$ hostname --fqdn
<myprovider>.at
Shouldn't it be d2.<myname>.at, since that's the first entry after <myexternalip>? And if it's the second entry, shouldn't it by <myname>.<myprovider>.at instead of just the domain name?
I'm aware that I could probably fix this by playing around with the hosts file, but I'd really like to understand why this happens. I read the hostname man page and googled and think that it should return d2.<myname>.at in my case. Thus, I'd really prefer an answer along the lines of "This is because ..." instead of "Try ... and see if it works.".
The system is Debian 7.5 "wheezy".
