[update] : It was much more lengthy so installed a fresh OS.
I was trying to install MIT app inventor Emulator, So install that I need to move a folder in usr/google/foldername. There was no folder named google in usr folder so I right clicked and gave ownership to active user but still I couldn't make folder so I opened a terminal with root access and typed
mkdir google . Next I tried to move a folder from downloads to that google folder but go this error
sudo: /usr/bin/sudo must be owned by uid 0 and have the setuid bit set
So I searched internet and find some solution in askubuntu forum, which is below,
chown root:root /usr/bin/sudo && chmod 4755 /usr/bin/sudo
it solved that( not sure) partially So I now I am getting this when doing sudo su,
sudo: error in /etc/sudo.conf, line 0 while loading plugin "sudoers_policy" sudo: /usr/lib/sudo/sudoers.so must be owned by uid 0 sudo: fatal error, unable to load plugins
I am Still able to login to root and My WiFi network is also gone.
Is there any hope or should I go for fresh install.