I recently started having this error when using the sudo command:
sudo: /etc/sudoers is mode 0644, should be 0440 sudo: no valid sudoers sources found, quitting
Any idea how to resolve this? I use Ubuntu.
The error tells you that you need to set the file permissions of /etc/sudoers to 0440. Log in as root or escalate yourself to root using
Have no idea how file permissions could have changed though.