sudo: /usr/bin/sudo must be owned by uid 0 and have the setuid bit set

Question

By mistake I entered the command

sudo chmod -R 777 somefolder ./

Now I am unable to log in to my system as root user. I have the login loop problem

Why would you want to log in as root? What directory were you in when you ran the command? If you have the error in your title, I guess you must have run it at least on /usr if not on /. Fixing recursive chmod is a pain... If you want the least hassle, get your data off there with a live USB and reinstall — Zanna, Aug 11 '17 at 07:18
Possible duplicate of What if I accidentally run command "chmod -R" on system directories (/, /etc, ...) — muru, May 16 '18 at 07:25

basebandit · Answer 1 · 2018-05-16T07:57:14.653

Hi i had a similar problem and this is how i solved it.

First reboot your machine and enter the recovery mode from your grub menu
Choose the drop to root shell option.This will prompt you with a control-D to continue just press enter
You are now in a root shell.Do the following

mount -o remount,rw /
chown root:root /usr/bin/sudo
chmod 4755 /usr/bin/sudo
exit
Go back to the menu and choose resume normal boot

1 Answers1