>> > >> I need to test a kernel config change on a remote system.  Is there a
>> > >> safe way to do this?  The fallback thing in grub has never worked for
>> > >> me.  When does that ever work?
>> > >
>> > > You can press ESC in the Grub screen and it will take you to text-only
>>
>> mode.
>>
>> > >  There, you select an entry, press "e" and edit it.  Press ENTER when
>>
>> you're
>>
>> > > finished, and then press "b" to boot your modified entry.
>> > >
>> > > That way, you can boot whatever kernel you want if the current one
>>
>> doesn't
>>
>> > > work.
>> >
>> > I can't do that remotely though.  I'm probably asking for something
>> > that doesn't exist.
>> >
>> > - Grant
>>
>> Situations like these that made me decide with great conviction to always
>> deploy my servers virtualized, even if the box in question will only host a
>> single VM.
>>
>> Now, if I lost my intelligence for a couple of seconds and somehow ended up
>> with a VM that's no longer accessible remotely, I just connect to the
>> virtual console.
>>
>> The flip side? Now I'm getting too daring/careless, and the uptime now
>> drops below my (self-imposed) target of 99.99% :-P
>
> What do you do when you need to upgrade the host, rather than the guest?
>
> --
> Regards,
> Mick

Exactly.

- Grant

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