if you want to uninstall linux without partioning the entire harddisk again.you can just put the ubuntu cd go to manual partioning and choose fat32 filesystem for the partion in which you installed linux(remove both the swap and ext2 partition).write it to disk.reboot. the only thing is i am not able to remove the boot loadre option. is there a way for that. please tell me. also i would like to know how to install freebsd.please tell me the partioning method.