On a colleagues computer, everytime I use a sudo command, I get this error:
sudo: must be setuid root
I tried various things mentioned on the internet, like changing the permissions to 4755 from a live cd, but even this command from a live-cd
sudo chmod 4755 /media/device/usr/bin/sudo
gives the same error.
EDIT: The colleague told me that he executed this command, god knows why :/
sudo chmod -R 777 / or
sudo chmod -R 777 He isnt exactly sure.