Unable to uninstall fedora 9 from system.
I'm new at using Linux. I was having a system with fedora 9 installed in it. I tried to remove it using this command:
dd if=/dev/zero of=/dev/sda bs=512 count=1
and then I shut down my computer. Now I am trying to install ubuntu from USB drive but i am not able to do that. System is not responding to boot from USB HDD.Please suggest me what to do.