sudo problem/question

[Tom H]

On Mon, Apr 12, 2010 at 7:59 AM, Kipton Moravec <kip at kdream.com> wrote:
> On Mon, 2010-04-12 at 05:35 -0400, Tom H wrote:
>> On Mon, Apr 12, 2010 at 1:53 AM, Kipton Moravec <kip at kdream.com> wrote:
>> > On Mon, 2010-04-12 at 01:24 -0400, Tom H wrote:
>> >> On Sun, Apr 11, 2010 at 11:46 PM, Kipton Moravec <kip at kdream.com> wrote:
>> >> > When I try to use sudo on one of my 8.04 Ubuntu computers I get the
>> >> > message
>> >> >
>> >> > sudo: unable to resolve host violet
>> >> >
>> >> > It then asks for the password.
>> >> >
>> >> > The prompt is kip at violet:
>> >> >
>> >> > So part of the machine knows it is violet.
>> >> > violet is the name of the machine in the System -> Network -> General
>> >> > (Tab) -> Host Name: field.
>> >> >
>> >> > How do I fix it so the warning does not appear?
>> >> >
>> >> > I tried adding an alias in the hosts as it had
>> >> >
>> >> > 127.0.0.1 localhost violet.Workgroup
>> >> >
>> >> > so I changed it to
>> >> >
>> >> > 127.0.0.1 localhost violet.Workgroup violet
>> >> >
>> >> > but that did not fix it.
>> >>
>> >> Please post
>> >> cat /etc/hostname
>> >> cat /etc/hosts
>> >>
>> > kip at violet:~$ cat /etc/hostname
>> > violet
>> > kip at violet:~$ cat /etc/hosts
>> > 127.0.0.1 localhost
>> > 127.0.1.1 violet.home violet.workgroup violet.WORKGROUP
>>
>> You have to boot into single/recovery mode and add violet to the 127.0.1.1 line.
>
> That fixed it.
>
> My other computer red does not have the problem.
>
> kip at red:~ $ cat /etc/hosts
> 127.0.0.1 localhost red.Workgroup
> 127.0.1.1 red.Workgroup
>
> And it does not have red in the line. And it works. I do not understand.

Most probably because re.Workgroup is an alias of localhost.