sudo: unable to resolve host Lair

[Fenris_rising]

fenris@Lair:~$ cat /etc/hosts
127.0.0.1 localhost
127.0.1.1 Lair.TOTSVILLE

# 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
fenris@Lair:~$ cat /etc/hostname

i have changed the top line as follows;

127.0.0.1 Lair
127.0.1.1 Lair.TOTSVILLE

now i get this in terminal when i close i.e. gedit /etc/*****

Usage:program_name [address][:port]Usage:program_name [address][:port]Usage:program_name [address][:port]fenris@Lair:~$ sudo gedit /etc/hosts

@Hal looked at the thread you indicated and have adjusted my host file in a similar fasion. result sorted
now im not sure i can assist in why it suddenly began but here goes. my hostname was picked during install.
samba was installed later and i had to add a line to gain permission to create shares, i also changed the 'group'
from the default.

workgroup = TOTSVILLE << changed from the default 'workgroup'
usershare owner only = False<< added this whole line

at the time nothing occured. BUT the latest updates requested if i wanted to keep my current smb.conf or install the newer 1. i opted for the newer one, last time i refused a similar offer it caused severe problems later, and of course i had to go back in to smb.conf to re-edit as before. this is the only thing that was done after the latest updates and emmediately before it started throwing the message up. thanks for all your help guys, clicking your thanks