Fix your computer when you can no longer boot from it

THIS APPLIES TO ALL ARCH LINUX BASED DISTRO’S

Changing root is commonly done for performing system maintenance on systems where booting and/or logging in is no longer possible. Common examples are:

Reinstalling the bootloader.
Rebuilding the initramfs image.
Upgrading or downgrading packages.
Resetting a forgotten password.
or just when you broke your system and can no longer boot.

Then we mount the partitions we need and undo whatever broke your system.

loadkeys be-latin1
mount /dev/sda3 /mnt
mount /dev/sda1 /mnt/boot
arch-chroot /mnt