Ubuntu – How to solve “Incorrect permission on/usr/lib/policykit-1/polkit-agent-helper-1(need to setuid root)”

This is the solution I came up with and tried, and it seemed to work, not sure why the permissions changed on this file though.

sudo chmod 5755 /usr/lib/policykit-1/polkit-agent-helper-1

I also saw a version that tried: sudo chmod +s ... but I didn't like the file permissions, so I opted to mirror the other permissions for the files in /usr/lib/policykit-1/

• See: Chmod 5755

• Read more about polkit on the manpage