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On 07/05/2012 04:20 PM, Dale wrote: |
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> |
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> I'm waiting on new/more docs myself. I want to know not only how to |
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> upgrade but how to fix if it pukes on my keyboard. Hopefully other than |
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> chroot'in in and all. |
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There are basically only two ways that grub2 or grub1 can fail: |
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First, you reboot and you don't even see a grub prompt because |
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the grub part of your boot sector is broken in some way. I think |
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the only practical way is to reinstall grub to the boot sector |
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of your boot disk, which probably involves booting from another |
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medium like a rescue CD, etc. |
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Second, you reboot and see a valid grub shell prompt but your |
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list of boot selections is missing for some reason. |
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In that case I've been able to bail out very simply by typing |
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various grub shell commands until I re-discover the right disk |
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in case the BIOS disk numbering has changed for some reason. |
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You do have to know the grub shell commands pretty well to get |
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away with that, though. The way to learn them is to hit 'c' |
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at the grub menu to drop into the grub shell mode and keep |
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hitting 'tab' to see a list of available commands wherever |
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you happen to be at the time. Just like legacy grub. |
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