# The following lines are desirable for IPv6 capable hosts
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
--------
With that, "hostname -f" incorrectly returns just the unqualified hostname.
I think part of the problem is the layout convention being used for /etc/hosts. The first example above was the result of the Ubuntu alternate installer. On a different system installed with Ubiquity, however, I have this (note that this system does not have a domain part, so I can't tell if "hostname -f" is broken or not):
Here is my view of the problem: On an up-to-date Maverick install, if /etc/hosts looks like the following on bootup...
-------- intra.example. com hostname
127.0.0.1 localhost
127.0.1.1 hostname.
# The following lines are desirable for IPv6 capable hosts
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
--------
...NetworkManager changes it (syslog: "<info> Updating /etc/hosts with new system hostname") to this:
-------- localdomain localhost localdomain6 localhost6 intra.example. com hostname
127.0.0.1 hostname localhost.
::1 hostname localhost6.
127.0.1.1 hostname.
# The following lines are desirable for IPv6 capable hosts
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
--------
With that, "hostname -f" incorrectly returns just the unqualified hostname.
I think part of the problem is the layout convention being used for /etc/hosts. The first example above was the result of the Ubuntu alternate installer. On a different system installed with Ubiquity, however, I have this (note that this system does not have a domain part, so I can't tell if "hostname -f" is broken or not):
-------- localdomain localhost localdomain6 localhost6
192.168.1.XX hostname # Added by NetworkManager
127.0.0.1 localhost.
::1 hostname localhost6.
127.0.1.1 hostname
# The following lines are desirable for IPv6 capable hosts
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts
--------
I think N-M's logic for modifying /etc/hosts may not be robust enough to generate a correct file given some of these inputs.