Problem with sudo

[Sameera Shaakunthala]

Thank you for  your replies...

Sorry, I forgot to tell how the initial terminal prompt goes,
shaakunthala at shaakunthala-laptop:~$

Avi Greenbury's solution worked -- thanks Avi :)
in this file, it was somehow shaakunthala-laptop.mshome.net pointed to
127.0.0.1
that's because i connect this laptop to a Windows network

Thank you very much... !
Now I have to do is to log in as root (recovery mode) and vi /etc/hosts

-- 
..:Sameera Shaakunthala:..
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