sudo: /etc/sudoers is mode 0640, should be 0440?
When a similar message appears when you try to run sudo on your machine, the problem is likely with the permissions of /etc/sudoers file.
Try running
pkexec chmod 0440 /etc/sudoers
The command asks for password. Check if it ran successfully by typing
echo $?
Upon successful execution, sudo should be working on your machine.
Posted by Sandheep to Sandheep's deck (2015-12-17 06:37)