17 hours ago
I stupidly ran this command in Ubuntu 18.04:
sudo chown -R $USER:$USER /usr
Now I want to undo this but when I run:
chown -R root:root /usr
I get this error:
operation not permitted
And I can't run a sudo command and gives me this error:
/usr/bin/sudo must be owned by uid 0 and setuid bit set
How can I fix this?
36 hours ago
You have to boot in maintenance (recovery) mode or with live CD / USB and mount the root volume.