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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?

Kulfy
  • 18,154
fjahan
  • 1

1 Answers1

2

You have to boot in maintenance (recovery) mode or with live CD / USB and mount the root volume.

FedKad
  • 13,420