How to Change Root Password in Ubuntu 18.04 LTS? YouTube

By default root does not have a password and the root account is locked until you give it a password. When you installed Ubuntu you were asked to create a user with a password. If you gave this user a password as requested then this is the password you need. If not, or you have forgotten it, then you need to set a password.. When I go to Network Preferences and click the lock icon on the lower left corner, I am prompted for my username and password. I simply enter my password and the lock icon becomes unlocked. But when I go to a shell and enter su, I get this: $ su Password: su: Sorry What password do I enter here?

simily giving "su" or "su -" will prompt for root password. "su " - this will prompt for user's password. if the password is correct login to the user without taking the .profile* values of the user. "su - " - this is just like the above one.. If you are coming to Ubuntu from another Linux distribution, you may wonder what the default root password is or how to change the root password. By default, in Ubuntu, the root user account is disabled for security reasons. This tutorial explains how to temporally change to the root user account and how to set the root password on Ubuntu systems.