[sudo-users] accidentally changed the owner of sudo

Tingyu Lu tlu3 at ncsu.edu
Fri Sep 1 09:52:13 MDT 2017

Thanks for your reply. I followed your steps, and I can use sudo now.
However, when I did "ls -l", I got the same message : *-rw-rw-r--  1 heat
heat   38 2017-04-25 15:22 sudo*

Does it mean the permission is wrong? How can I fix it?

Many Thanks,

On Fri, Sep 1, 2017 at 10:43 AM, Todd C. Miller <Todd.Miller at courtesan.com>

> If you are using a system that does not let you log in as root,
> such as Ubuntu or macOS, you will need to boot into single user
> mode to repair the permissions and file mode.  On most other
> systems you should be able to use "su" to change to the root
> account.
> To repair the ownership and mode run:
>     chown root /usr/bin/sudo
>     chmod u+s /usr/bin/sudo
>  - todd

Best Regards,
Tingyu Lu
Mechanical and Aerospace Engineering
911 Oval Dr. - 3404 EBIII
North Carolina State University
Raleigh, NC 27695

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