This question is different, or at least I think so, from the others that I have seen. It turns out that I installed ubuntu well (I reiterate, I installed well, I followed all the steps correctly) 18.04 from my usb on my computer, which has windows 10. The problem is, that although ubuntu is installed and things are saved and everything in That partition, when I start the computer, it starts directly by windows 10 without asking in the grub. In order to open my grub I have to put the usb, where the live usb grub appears, where it says "-try ubuntu, -install ubuntu, ... etc". in this screen I do not click any but I give Esc, then I type in a type of terminal that appears as "grub". the command "exit" and there just showed me the boot menu (which could be accessed with F9). There what I do is select "TOSHIBA ....." and there if I can boot ubuntu, the one I have installed. What I want is that this grub appears to me simply when the computer is turned on, I mean in a normal way, so that it lets me decide the operating system that I want to use. I have already reviewed several tutorials, which say: "recover grub", "recover boot ubuntu", "recover dual boot", etc. And none of these serves me. I attach some of these links:
Thank you very much
