I am trying to change root password in my Ubuntu .
This is what I did:
1: installed linux on dex on google play
2: downloaded the ubuntu 16.04 LTS arm image
3: After starting the image in linux on dex, enter the graphical interface directly.
I don't know the passwords of the current users ‘dextop’ and ‘root’ users. How can I change their passwords?
sudo su passwd root
it dones't work ,becaus I also don't know the password of the current user.
I can't start single-user mode and repair mode, and I can't change the password of any user without knowing the current user password. Sorry, my english sucks, will there be any help?