I have just bought a new laptop running Free-DOS OS, 4 GB RAM and 1 TB HDD and want to install Ubuntu on it. I have a bootable USB from which I can run Ubuntu 14.04 in "Try Ubuntu mode". I now want to install Ubuntu on the HDD, but I noticed that it is already partitioned (2 DOS partitions). During the install, I want Ubuntu to use the entire 1 TB of disk (as treat it as 1 disk). Please can you guide me on how to "remove" the DOS partitions during/before the install?
NOTE: there is no other OS running on the laptop - I want to use it exclusively for Ubuntu.
Apologize if this is a duplicate question.