I have Deepin linux installed and now I need to install ubuntu. I don't have CD ROM , so I thought I can use GRUB2 ISO boot option. I have used the link Install Ubuntu from iso file using grub2 to boot ISO using GRUB2. I need to install the operating system. When I click Install Ubuntu icon in desktop, the installer starts. But I can't see the option where we can specify the partition. It just directly goes to installing. Even if I click install, the installer does nothing and the installation didn't start. What to do? Any ideas?