Well Ubuntu is different from most other Linux distributions in the way that it does not have a root account that is enabled by default. There are times when it is handy to have a root account so I’ll show you how to set it up.
1. Open the terminal and type: sudo passwd root
2. You’ll get a prompt to “Enter new UNIX password”, enter the password you want for the root user and confirm it.
Now you can log out and log in as root.
Posted by Adam 
