I fixed my error
"sudo: unable to resolve host lian-ubuntu-beta"
by making entries in System->Administration->Network
such that afterward the files /etc/hostname and /etc/hosts read:
$ cat /etc/hostname
lian-ubuntu-beta
[EMAIL PROTECTED]:~$ cat /etc/hosts
127.0.0.1 localhost lian-ubuntu-beta
127.0.1.1 lian-ubuntu-beta
192.168.1.103 lian3.foxgulch.net lian3
# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts
Specifically System->Administration->Networking Unlock Then Authenticate
then In the Hosts Tab
highlight the "127.0.0.1 localhost" line
click properties
make it read
IP address: 127.0.0.1
Aliases : localhost
lian-ubuntu-beta
In the General Tab
Hostname: lian-ubuntu-beta
Domain Name: (nothing or blank)
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sudo shouldn’t ABSOLUTELY NEED to look up the host it’s running on
https://bugs.launchpad.net/bugs/32906
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