On Mon, Jan 13, 2020 at 5:46 PM Ed Greshko <ed.greshko(a)greshko.com> wrote:
On 2020-01-14 06:01, Mauricio Tavares wrote:
> So I want to add a few options to the kernel (say iommu support). I
> have been told before to avoid using grub2-mkconfig because it would
> apply the changes to all currently available (to boot from) boot
> kernels. Instead, I should edit just the latest kernel entry in the
> grub.cfg file, adding the option to the line starting with linux16.
> This way, if it went boink, all I had to do is reboot, pick another
> kernel from the grub menu and off I went. And, it seems that every
> future kernel upgrade would incorporate this change.
>
> Is that accurate or is there a cleaner way to do the same while still
> leaving me the option to go back to the grub menu?
>
Do you wish to try out some options without make a permanent change?
Assuming your using Fedora Workstation, which unlike other spins, doesn't present the
list of kernels to boot.
You'd just hit the "escape" key when booting. Then you'd see the list
of kernels. Hit "e" to edit. Go to the
linux line, add the parameters and then Ctrl-x to continue the boot.
Those changes are temporary.
If all works as you'd like, then you could make them permanent.
Thank you for your reply but it seems I failed to properly
explain myself. I want to ensure my changes only affect the latest
kernel (and future kernels) as listed in the grub menu. I was not
aware there is a version of fedora which would not list available
kernels; if there is I would rather not use such version. The fedora
version I use does provide me with a proper grub menu hence me
describing that in the problem statement.
> --
> The key to getting good answers is to ask good questions.
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