this post was submitted on 24 Aug 2023
99 points (96.3% liked)

Linux

48078 readers
937 users here now

From Wikipedia, the free encyclopedia

Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

Rules

Related Communities

Community icon by Alpár-Etele Méder, licensed under CC BY 3.0

founded 5 years ago
MODERATORS
AgreeableLandscape@lemmy.ml
nooter692@lemmy.ml
MarcellusDrum@lemmy.ml
cypherpunks@lemmy.ml
cyclohexane@lemmy.ml
d3Xt3r@lemmy.nz
99
UPDATE: I successfully dual booted Linux! and then I messed up... (lemmy.ca)
submitted 1 year ago* (last edited 1 year ago) by otter@lemmy.ca to c/linux@lemmy.ml
30 comments fedilink hide all child comments
 

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.

you are viewing a single comment's thread
view the rest of the comments
[–] luthis@lemmy.nz 4 points 1 year ago* (last edited 1 year ago) (1 children)

mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82/boot/grub$ find . -name normal.mod

./x86_64-efi/normal.mod

mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82/boot/grub$ ls

mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82/boot/grub$ vi grub.cfg

mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82/boot/grub$ cd ../..

mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82$ sudo mount -o bind /dev dev

mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82$ sudo mount -o bind /proc proc

mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82$ chroot .

chroot: cannot change root directory to '.': Operation not permitted

mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82$ sudo chroot .

[root@mint /]# find . -name grubx64.efi

[root@mint /]# sudo fdisk -l

sudo: unable to allocate pty: No such device

[root@mint /]# exit

mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82$ mount -o bind /dev/pts dev/pts

mount: /media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82/dev/pts: must be superuser to use mount.

mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82$ sudo mount -o bind /dev/pts dev/pts

mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82$ sudo chroot .

[root@mint /]# sudo fdisk -l

[root@mint /]# lsblk

lsblk: failed to access sysfs directory: /sys/dev/block: No such file or directory

[root@mint /]# exit

exit

mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82$ sudo mount -t sysfs /sys /mnt/sys

mount: /mnt/sys: mount point does not exist.

mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82$ sudo mount -t sysfs /sys

mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82$ sudo mount -t sysfs /sys sys

mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82$ sudo chroot .

[root@mint /]# lsblk

NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS

loop0 7:0 0 2.6G 1 loop

sda 8:0 1 14.6T 0 disk

└─sda1 8:1 1 14.6T 0 part

sdb 8:16 0 476.9G 0 disk

└─sdb1 8:17 0 476.9G 0 part

sdc 8:32 1 232.9G 0 disk

├─sdc1 8:33 1 223.1G 0 part

└─sdc2 8:34 1 9.8G 0 part [SWAP]

sdd 8:48 1 14.6T 0 disk

└─sdd1 8:49 1 14.6T 0 part

sde 8:64 1 29.1G 0 disk

├─sde1 8:65 1 2.8G 0 part

├─sde2 8:66 1 4.1M 0 part

└─sde3 8:67 1 26.4G 0 part

nvme0n1 259:0 0 931.5G 0 disk

├─nvme0n1p1 259:1 0 500M 0 part

├─nvme0n1p2 259:2 0 2G 0 part

└─nvme0n1p3 259:3 0 929G 0 part /

[root@mint /]# fdisk -l

[root@mint /]# mount /dev/nvme0n1p1 /efi

[root@mint /]# grub-install --target=x86_64-efi --efi-directory=efi --bootloader-id=GRUB

Installing for x86_64-efi platform.

Installation finished. No error reported.

[–] luthis@lemmy.nz 4 points 1 year ago* (last edited 1 year ago)

So for a step by step,

I booted into Mint and opened a terminal and cd to my OS drive.

I checked my grub folder:

mint@mint:/media/mint/a96b3354-70dd-45ed-8c6c-95171e9f1e82/boot/grub$ ls

fonts grub.cfg grub.cfg.broke grubenv locale themes x86_64-efi

made an edit with vi (irrelevant here)

went back to / on my OS drive

mounted the various partitions needed, that's all the mount -o bind commands, dev, proc, dev/pts, sys

then chroot to my OS drive so that I'm working inside my Arch install not the Mint install

then I mount the efi and grub install

[root@mint /]# mount /dev/nvme0n1p1 /efi

[root@mint /]# grub-install --target=x86_64-efi --efi-directory=efi --bootloader-id=GRUB