I'm getting this error message:

"Incorrect permission on /usr/lib/policykit-1/polkit-agent-helper-1(need to setuid root)"

Due to this problem I can't download any app.

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    Did you do something to your system just before this started to happen? If you strred your system with a root stick, playing whack-a-mole with the aftereffects isn't worth the effort. – waltinator Feb 2 '19 at 21:42

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/

| improve this answer | |
  • that works, thank you! – Kamil Naja Nov 3 '19 at 13:46
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    Thanks, sudo chmod 5755 /usr/lib/policykit-1/polkit-agent-helper-1 is secure. It worked for me. – Aravind Nov 6 '19 at 18:15
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    Thanks alot, worked like expected! – BloodyLogic Mar 24 at 14:23

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