Illegal username in Mac Single User

Question

My sudoers permissions changed and I am trying to correct that. I get the erro message sudo: /etc/sudoers is owned by gid 80, should be 0. When I try to change the ownership to 0 I get the error message: chown: 0.0: illegal user name

Answer 1

BSD chown uses : to separate the user and group, not ..

chown 0:0 sudoers