Check following folders permissions and ownership (should be owned by ‘root’, and have same following permissions):

ls -l /usr/bin/sudo
---s--x--x 2 root root  /usr/bin/sudo 


ls -ld /usr
drwxr-xr-x  root root /usr 

/etc/suoders

## Allows people in group wheel to run all commands
%wheel ALL=(ALL) ALL 200013630 ALL=(ALL) ALL

/etc/fstab

If you found nosuid, remove it and restart.

Advertisements