Debian 9.1 - LiveCD root password

[Юрий Жданов]

Hello!
1) I download live CD Debian  debian-live-9.1.0-amd64-xfce.iso

What default password for root user?

i try 
su root
live
but system say Authentication failure


2)  Where can I get Debian 9.1 live CD without gui, only command shell?

Thx.