I did a stupid thing, on my Ubuntu 16.04 Droplet, I gave a chmod -R 777 * command on /usr folder. I wanted to restart my Nginx server, but it gave me an error (of course) :
sudo: /usr/bin/sudo must be owned by uid 0 and have the setuid bit set
And I can not access sudo su - root.
How can I reverse all that?
Thanks you for your answers.
These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.