Update from this post from the other day: What to know before Dual Booting Windows + Linux?
TLDR: I got it working, started learning, tried to fix a grub issue and borked the whole system.
So after considering all the advice, I went and disabled/prepped/backed up, and started the process. I managed to get Fedora KDE installed on another partition and everything was looking ok. I installed some programs, started learning for a few hours, but there was one small issue. The grub configuration from the video didn’t really work. Windows wasn’t booting by default, and when I tried to do the GRUB_SAVEDEFAULT=true to have it boot the last OS, it also didn’t work. When booting windows, a message would flash by saying '/EFI/fedora/grubenv' not found.
Looking more into it, the video says to use sudo grub2-mkconfig -o boot/efi/EFI/fedora/grub.cfg but I think the correct one now is grub2-mkconfig -o /boot/grub2/grub.cfg? I found this thread, but I couldn’t run the first command because it gave a conflict error, and I think there were two versions of grub2 installed?
So anyways, I tried running the setup again, thought it was ok and did a reboot to test… and got hit with a black screen with minimal BASH like line editing is supported.
At this point I’m a little worried and lost, thinking maybe I wasn’t ready to try this, and trying to get it back the way it was. I found this guide, but I get stuck trying to mount the EFI partition.
Any tips on where to go from here? Right now I plugged in the USB I used earlier, booted Fedora from it, and opened the terminal. Past that I’m a bit lost on how to fix grub.
Honestly, if you’re new to linux, the best way to recover from borked GRUB is to reinstall linux. You can boot from a live CD, mount positions, chroot, and fix it, but I found that more difficult than reinstall until I had a bunch of experience.
Right, and while in the install process, and the installer detects there is another os in your drive, “tell” the installer (there will be the option to do this) that you want both systems and choose the order of prefered booting. It is the simpler way for a new user.
I have been using linux since 2000 year and at firts had to learn how to configure lilo to get my cdrom working. When distros changed to grub i quit learning that stuff. Used my time learning other things, like R or chempaint.
No one should begin tinkering with grub and other sensitive parts of your system, begin with the command line and system tools first.