User is not in the sudoers file. This incident will be reported

On using the sudo command if we see the error 

 

This
means that the user as whom we have logged in and are trying to run the command
"sudo" does not have the permission to do
so. 
Only the users listed
in /etc/sudoers have the permission to use the
command "sudo". 
To give the sudo
permission to a user we need to add the user to the
file /etc/sudoers file. 
Open
the file /etc/sudoers as
root. 

 

Add
the
line 

 

under
the User privilege specification section. 
Save the file
and exit, now the sudo command should work for
the user which was added in the file.

User is not in the sudoers file. This incident will be
reported