Again, unless something has gone wrong, the grub config should auto-detect the other Linux distros installed and add them to the boot menu. It should look like this:
EDIT: Also, what can happen is that the grub timeout (the time that menu is on screen) is set to 0 seconds. You can get the grub menu to stay up by holding left shift during boot if that’s the case.
Having dual booted Fedora and Ubuntu before, I will point out that they will both install Grub in the EFI under separate folders and do battle for first boot dominance every time there’s a kernel update.
Again, unless something has gone wrong, the grub config should auto-detect the other Linux distros installed and add them to the boot menu. It should look like this:
EDIT: Also, what can happen is that the grub timeout (the time that menu is on screen) is set to 0 seconds. You can get the grub menu to stay up by holding left shift during boot if that’s the case.
Having dual booted Fedora and Ubuntu before, I will point out that they will both install Grub in the EFI under separate folders and do battle for first boot dominance every time there’s a kernel update.