arch-chroot command is used to create chroot jail which changes the root directory from the current one (in the virtual system booted from the ISO image) to the real one that is on your disk. Thus, the rest of the commands will consider your disk as the currently booted system and apply the changes. Note that the command prompt changes slightly to reflect the change:
# arch-chroot /mnt /bin/bash
In case you encounter the below error:
arch-chroot: command not found
you can install the package shown below as per your choice of distribution.
| Distribution | Command |
|---|---|
| Debian | apt-get install arch-install-scripts |
| Ubuntu | apt-get install arch-install-scripts |
| Alpine | apk add arch-install-scripts |
| Arch Linux | pacman -S arch-install-scripts |
| Kali Linux | apt-get install arch-install-scripts |
| Fedora | dnf install arch-install-scripts |
| Docker | docker run cmd.cat/arch-chroot arch-chroot |
The arch-install-scripts package is a small suite of scripts aimed at automating some menial tasks when installing Arch Linux. These scripts can also aid when debootstrapping a Debian-based system. This package contains genfstab which assists with generating a fstab and arch-chroot which assists with setting up bind mounts and disabling services via policy.d.