>>>>>> 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? >> > > I think setting up a VM on the server using the new kernel should help > test a new kernel? > > -- > Nilesh Govindarajan > http://nileshgr.com
I haven't used a virtualized OS in awhile but the last time I did the hardware interacting with the virtualized OS was also virtualized and wasn't representative of the actual hardware. I don't think I can test the interaction between a kernel and my actual hardware from a virtual OS. - Grant
