How do I solve "Incorrect permission on/usr/lib/policykit-1/polkit-agent-helper-1(need to setuid root)"?

18.04 authentication

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

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