On 2020-01-14 07:10, Mauricio Tavares wrote: > On Mon, Jan 13, 2020 at 5:46 PM Ed Greshko <ed.gres...@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.
When you escape into the menu you'll most likely see 3 (or 4 if there is a rescue) kernel. The one at the top is the most recent, default, kernel. Your changes will only affect the kernel that you pick to edit, the most recent/default. The changes will only be for the one boot. If you boot again, the changes will have to be made again. That is what I meant by "temporary". This, is good for "testing" should things go bonkers. You can reboot, the changes you made are gone. And you can continue as normal. I should have indicated that, in my experience, that was a good way to test things with the least amount of pain should things go wrong. Then, after testing, make things permanent. -- The key to getting good answers is to ask good questions. _______________________________________________ users mailing list -- users@lists.fedoraproject.org To unsubscribe send an email to users-le...@lists.fedoraproject.org Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org
