1) groupadd wheel 2) adduser username wheel as root 3) edit /etc/sudoers and remove the comment from line 25 that's the "#" character and save sudoers overriding objections about it being read only, 4) go into your user account and type sudo -i <cr>, 5) type whoami <cr>, 6) type exit <cr> then type whoami again. Notice what you didn't get prompted for?