cannot use sudo after using sudo passwd root

Question

My System problem detected when I tried sudo passwd root in my ubuntu.

I changed my root password by using the below command.

sudo passwd root

Now my system password changed, after this i could not use sudo now.when I try to use sudo -i I am getting error messages below.

sudo: error in /etc/sudo.conf, line 0 while loading plugin 'sudoers_policy'
sudo: /usr/lib/sudo/sudoers.so must be only be writable by owner
sudo: fatal error, unable to load plugins

your user password is different then the Unix `root` password — Mudit Kapil, Mar 15 '15 at 10:51
see Askubuntu post[How do I reset a lost administrative password?](http://askubuntu.com/questions/24006/how-do-i-reset-a-lost-administrative-password) — Mudit Kapil, Mar 15 '15 at 12:33

score 0 · Answer 1 · answered Mar 15 '15 at 11:07

0

Try:

su
passwd -l root
exit

Once made this, try again sudo -i

answered Mar 15 '15 at 11:07

0x2b3bfa0

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how should i execute these commands..when i try `su` it asks me password.. – Manikandan Arunachalam Mar 15 '15 at 11:22
Yes, you may need to type the root password, the same password that you typed twice when prompted after executing the `sudo passwd root` command – 0x2b3bfa0 Mar 15 '15 at 11:43
Did it worked? If worked, please accept my answer else say me what fails. – 0x2b3bfa0 Mar 21 '15 at 10:23
Sorry @Helio not worked..i changed my OS i couldn't wait for a long time. – Manikandan Arunachalam Mar 23 '15 at 09:23
Ok, sorry. However, if do you have any doubt, please ask on this site. – 0x2b3bfa0 Mar 23 '15 at 09:25

cannot use sudo after using sudo passwd root

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