I am actually using Ubuntu 14.04LTS. I kept the larger files in a .(dot)folder in administrator directory and my total disk space is filled.

I previously got the information that I have low disk space. Even though the desktop is blank and each and every time when I login in administrator it will give blank desktop it doesn't show any folder or applications.

But I can easily login into guest session, so how can I delete those administrator files to make free space by using guest session or some thing else?