[ubuntu-in] sudo: unable to resolve host ubuntu

[Mehul Ved]

On 8/22/08, mallikarjun arjun <mallik.v.arjun at gmail.com> wrote:
> After upgrading from ubuntu gusty to hardy, when ever i try to do some sudo
> operation in terminal
> something like this shows and the requests for password. even though no
> problems, can anybody tell me what this means
>  Is it a bug???????
>
> "sudo: unable to resolve host ubuntu"

What do following commands return
cat /etc/hosts
grep hosts /etc/nsswitch.conf
hostname
ping $HOSTNAME