CODEWITHSUNDEEP
bashubuntucommand-lineubuntu-14.04sudo
user3551708
user3551708

Reputation: 943

How to fix permissions after Sudo chown root -R /usr

How do you fix the permissions in /usr after sudo chown root -R /usr?

I managed to fix sudo using this but how should I fix the rest?

Upvotes: 1

Views: 1685

Answers (1)

Alvaro Gutierrez Perez
Alvaro Gutierrez Perez

Reputation: 3887

Most files on /usr are owned by root, so it should have not changed many files.

As you says that sudo has lost its setuid bit, all commands on /usr/ that had it must have lost it too. You will probably notice it when you try to run them, so you can add it to them again.

Edit:

I'm giving you some info about /usr on my personal machine that may help you to recover. I am using Ubuntu 14.04.

On my machine, all files under /usr are owned by root, except /usr/sbin/uuidd, which is owned by libuuid (and setuid to that user):

-rwsr-sr-x 1 libuuid libuuid 18904 ago  5 04:20 /usr/sbin/uuidd*

I also have the following files setuid, all by root, except the one I told you above:

/usr/sbin/uuidd
/usr/sbin/pppd
/usr/bin/passwd
/usr/bin/lppasswd
/usr/bin/sudo
/usr/bin/chsh
/usr/bin/newgrp
/usr/bin/traceroute6.iputils
/usr/bin/beep
/usr/bin/X
/usr/bin/chfn
/usr/bin/pkexec
/usr/bin/mtr
/usr/bin/gpasswd
/usr/lib/openssh/ssh-keysign
/usr/lib/chromium-browser/chrome-sandbox
/usr/lib/eject/dmcrypt-get-device
/usr/lib/policykit-1/polkit-agent-helper-1
/usr/lib/dbus-1.0/dbus-daemon-launch-helper
/usr/lib/pt_chown
/usr/lib/x86_64-linux-gnu/oxide-qt/chrome-sandbox

Upvotes: 5

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