My problem with Arch Linux


My problem with Arch Linux

Last week, I had a problem with my Arch Linux installation. I have been using Arch for over 4 years, and I must say that it is the most stable distribution that I have used in over 14 years. However, I made a mistake by modifying the Grub config (I hate you Nvidia, I hate you).

I have a somewhat special installation of Arch Linux with a fully encrypted disk over GPT, which caused one of the problems. First of all, after modifying the Grub config, I saved and updated it and then restarted my PC (at least I had saved a backup of my old Grub config). After that, I only had an infinite loop of reboots on my computer.

Normally, you would have a message to decrypt your disk, and then the Grub would be displayed. However, after my changes, after entering my decryption password, Grub just crashed, and my PC started to reboot.

Attempting to decrypt master key…
Enter passphrase for hd1, gpt2.

To repair this issue, you need to reinstall GRUB, and in my case, the following were the necessary steps:

Use lsblk  to identify the encrypted partition.

root@b4rt$ lsblk

Unlock the encrypted partition.

root@b4rt$ cryptsetup luksOpen /dev/sda1 cryptdiskb4rt

Use vgscan to detect the LVM volume group from this encrypted partition.

root@b4rt$ vgscan

Use vgchange to activate the volume group.

root@b4rt$ vgchange -ay

Now use Lvscan to get the lvm name from your root file system. You will have a similar to this:

root@b4rt$ sudo lvscan 
ACTIVE '/dev/vg/swap' [8.00 GiB] inherit
ACTIVE '/dev/vg/root' [500.00 GiB] inherit
ACTIVE '/dev/vg/home' [1.32 TiB] inherit

 Mount your root volume.

root@b4rt$ mount /dev/vg/root /mnt

Dont forget to mount this:

mount --bind /dev /mnt/dev
mount --bind /sys /mnt/sys
mount --bind /proc /mnt/proc

Use chroot

root@b4rt$ chroot /mnt /bin/bash

Now install grub

root@b4rt$ grub-install /dev/sda

Edit and rollback your configuration from:


Now run this to regenerate the Grub config

root@b4rt$ sudo grub-mkconfig -o /boot/grub/grub.cfg

Finally, exit from Arch and Reboot.

After that, finally i’m able to use my pc again. 
Never edit the grub configuration, unless you know 100% that you are not going to screw up your distro.

Related posts

Configurando el servidor SSH (ssh-parte 3)


SSH, LLaves publicas (ssh-parte 2)

Deja una respuesta

Tu dirección de correo electrónico no será publicada. Los campos obligatorios están marcados con *