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I want to build a dual boot environment of CentOS 7 and 8 on a UEFI/GPT machine.

But, I encountered a EFI bootloader problem; Both CentOS 7 and 8 installers put their bootloaders in the same place: \EFI\centos. So, the previous one will be overwritten by after one.

To avoid this conflict, I tried the following workaround:

  1. Install CentOS 7
  2. Install CentOS 8 without bootloader (ESP not modified),
  3. Boot CentOS 7 and make boot menu entries using grub2-mkconfig and os-prober.

This looks succeeded but also looks weird. If there is a way to put the bootloaders in ESP separately and list those by the EFI boot manager, I think that's better than above.

So my questions are:

  • Is there a way to put the bootloaders in ESP separately?
  • If no, the workaround I wrote above is correct?

Thank you

P.S. I know I can build individual virtual environments using VirtualBox etc, but I actually need a dual boot environment now for some reason.

  • you should be able to set it during install for centos8. But just out of curiosity... why do you want this? – Lars Nielsen Jan 14 at 10:18

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