user not in sudo group but can perform sudo operations

Question

Is this normal behaviour when I put a user student in sudoers file using visudo command like this :

visudo 

student   ALL = NOPASSWD:   ALL

And he is not in sudo group but can still perform sudo operations ?

So if a user is decribed in sudoers file he doesn't need to be in sudo group ?

score 5 · Accepted Answer · answered Dec 30 '20 at 16:50

It is normal. By default you have in /etc/sudoers:

# Allow members of group sudo to execute any command
%sudo   ALL=(ALL:ALL) ALL

So all users from the sudo group are allowed to do any operation. Adding a user to this group gives permissions because of this line.

You can add a separate user there as well.

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