[Wylug-help] Sudo broken

[Howard Close]

Hi,
My Ubuntu 11.04 installation has suddenly blocked my access to root
priveleges.

sudo foobar

gives

sudo: /etc/sudoers is mode 0640, should be 0440
sudo: no valid sudoers sources found, quitting.

 Clearly I cant chmod /etc/sudoers without superuser priveleges.

Not sure what has happened - any suggestions?

Howard
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