How to enable root login on ubuntu 16.04 ?zalam
Enable root logins first you have to set a password for the root account and then unlock the locked root account. If you don’t set a password for the root account the passwd command will return
passwd: unlocking the password would result in a passwordless account. So, first execute in a terminal
sudo passwd root
you will be prompted for a new Unix password. Write it twice (second for confirmation).
To unlock the account.
sudo passwd -u root
passwd: password expiry information changed
If you want to disable root account in Ubuntu you need to lock the root account by using the following command
sudo passwd -l root
Alternatives to root login
If you want to work on a root console you can also use