F21 emergency.target when root pw isn't set

[R P Herrold]

On Thu, 18 Dec 2014, Chris Murphy wrote:

> However, after changing the root password, the command 
> reboot is not found. And exit causes a kernel panic!

WHen I hit the 'systemd wants a root password' issue, I loop 
mounted the image I wished to boot, and set the root PW in 
/etc/shadow to a blanked value (i.e., no passwd) to get around 
the issue

-- Russ herrold