By default root user account is disabled for login in Ubuntu. Steps mentioned below will allow you to enable the root user and login as root on the OS. Login to your account and open Terminal sudo passwd root Type
Disable SIP in OS X El Capitan
I just got my MacBook Pro updated to OS X El Capitan and ran into problem with the system level utilities that I use for my work. They are now barred in El Capitan and you can no more access