On 8/27/20 5:01 PM, Robert McBroom via users wrote:
What does one do in the new environment to run different versions of
linux on different drives of a system. One system has f31 on sda and
centos7 on sdb. With legacy grub I could call the boot of one system
from the other and vice versa. No more. Switching drives in the bios no
longer works. I can kludge things by putting the boot files from the
centos7 system in the f31 boot and putting the boot stanza in the as a
custom entry in grub.d along with the stanza for Windows. All the
entries in /boot/1oader point to the f31 system. grubenv is only
appropriate for f31.
Boot a CentOS 6 live image and install GRUB legacy (assuming that your
system is configured for legacy/BIOS boot). Totally deprecated,
unsupported, politically incorrect, etc., etc., and far more functional
than GRUB 2.
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