Create new user with sudo permission

Usecase: I install linux without GUI ( so it didn't provide ubuntu user ). If I want to have another with sudo permission.
Let's try this

be root or user with root permission
>> adduser sudo

because in sudoer file, said Any user in group sudo, will have permission to use sudo command
ref: http://askubuntu.com/questions/7477/how-can-i-add-a-new-user-as-sudoer-using-the-command-line

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