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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.

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I accidently rebooted during pacman update and now my system dosen't show option to boot into endeavour os. Systemd just shows option to boot into firmware interface please help! (lemmy.ml)

submitted 1 year ago* (last edited 1 year ago) by 257m@lemmy.ml to c/linux@lemmy.ml

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I've lost everything and I don't know how to get it back. How can I repair my system all I have is a usb with slax linux. I am freaking out because I had a lot of projects on their that I hadn't pushed to github as well as my configs and rice. Is there any way to repair my system? Can I get a shell from systemd?

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

It should work, afaik chroot always use the binaries of the system you chrooted, so you will be able to use pacman normally. I don´t remember if chroot will mount the efi partition by default, you can do this before go to chroot (again, I'm have some memory issues but I believe that /dev does not mount as well if you just use chroot, this is why arch have arch-chroot that mounts this kind of stuff but you can mount before so it should work).

Assuming you are using systemd boot on efi partition (that is likelly if you have not changed the installer defaults), what I would do:

On your live CD run sudo fdisk -l to get what is the efi partition, usually will be /dev/sdb1 since sda will be your usb, you should be able to see something like that.
Then you will mount your endevour partition, in your situation should be sudo mount /dev/sdb2 /mnt/mydisk but check your fdisk command output.
Now you will have to mount the efi partition sudo mount /dev/sdb1 /mnt/mydisk/efi
Then you can use chroot /mnt/mydisk/ and proceed to do a pacman -Syu, this should trigger the post scripts that create the kernel images on the efi partition.