I have a 19.x openwrt install running on my x86 protectli box. I was able to upgrade it to 24.10.5 without issue, except that the version of grub in the bootloader is still something like v2.2 instead of the more recent v2.12, which includes a lot of features and fixes. So... how do I upgrade grub? On most OSes the answer is to run something like 'update-grub', but that doesn't seem to be available in any packges on 24.10.5. So is there another way?
Boot a recent Linux dist off a flash drive, do it from there.
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While that's doable, that's not really... sustainable? I'm a little worried about compatibility, etc. But also... why do those grub pacakges have no contents?