My boss wants a blank password on the desktop running the Ubuntu 15.04. The system logs me into the account directly but whenever I try to sudo command anything and it asks for the password, leaving the space blank doesn't work. I have been researching this for about an hour and I can't come up with any results that really help. I know I can't log in the root account directly, but I also can't do anything as long as the blank password isn't working. I use Kali pretty regularly but I'm not familiar with Ubuntu as much. Any help would be greatly appreciated.
EDIT: The employee who set up the machine set a normal password then "deleted the credentials so it would log in automatically". We've resolved to just reinstall and cut out losses, not waste anymore time on this.