My friends laugh at me when they are told that I have to put in 4 passwords with ~18 characters each to login into my computer. I laugh back at them, wishing them joy with Ads in the start-menu.
In this article, we will discuss true full disk encryption. Everything, including having the kernel encrypted using LUKS. I personally found difficulty in finding good documentation detailing how to set-up disk encryption. Hopefully this guide would help someone out there.
We will be installing Artix Linux🔗, because this is
what I use and recommend (not for everyone). This tutorial should work using
any distro that allows you to select where to install the system. In the end we
would have a bootable UEFI system where the user is prompted for a password to
/boot/ partition, then another prompt for the main partition.
The reason for this seperation is that GRUB, at least with my testing
(2021-08), does not officially (?) support LUKS2 formatting.
$ lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS sda 8:0 0 931.5G 0 disk ├─sda1 8:1 0 512M 0 part ├─sda2 8:2 0 2G 0 part └─sda3 8:3 0 929G 0 part └─hdd 254:0 0 929G 0 crypt ├─vol-root 254:1 0 150G 0 lvm / ├─vol-home 254:2 0 300G 0 lvm /home ├─vol-data 254:3 0 421G 0 lvm /data ├─vol-swap 254:4 0 8G 0 lvm [SWAP]
This would be the final result. LVM over LUKS2 for the main (
partition, LUKS1 for
/dev/sda2, and the UEFI disk on
I am not responsible for any loss of data that occurs because you irresponsibly ran any command.
Flash your ISO into your USB, turn off your device, plug the USB in, boot into the USB, and follow this guide from another device.
Partitioning the Disk
Following this would irreversibly erase your whole disk. First, start by
identifying the disk name. Run
lsblk, find your disk name by its known
space. I from hereafter use
/dev/sda as the installation hard-disk.
Using your favourite disk editing tools🔗,
do the following tasks:
- Label disk as GPT
- Create a 512MB, EFI tagged. FAT32 formatted. (
- Create the boot disk with 2GB. We will format it later on. (
- Create the main disk with as much space that is available, leave some at the
end. We will format it later on. (
Set up the boot disk, then the main disk:
$ cryptsetup luksFormat --type luks1 /dev/sda2 $ cryptsetup luksFormat --type luks2 /dev/sda3
Format the boot disk:
$ cryptsetup open /dev/sda2 boot-crypt $ mkfs.ext4 /dev/mapper/boot-crypt
Format the main disk as LVM:
$ cryptsetup open /dev/sda3 hdd $ pvcreate /dev/mapper/hdd $ vgcreate vol /dev/mapper/hdd $ lvcreate -L[your / size] -n root vol $ lvcreate -L[your /home size] -n home vol $ lvcreate -L[your /data size] -n data vol $ mkfs.ext4 /dev/vol/root $ mkfs.ext4 /dev/vol/home $ mkfs.ext4 /dev/vol/data
Your disk should be ready for installation!
This section won’t hold your hand installing a full Artix system. I will just
go over configuring the disk.
mount your horses and go
$ mount /dev/vol/root /mnt/ $ mkdir -p /mnt/home/ $ mount /dev/vol/home /mnt/home/ $ mkdir -p /mnt/boot/EFI $ mount /dev/sda1 /mnt/boot/EFI $ mount /dev/mapper/boot-crypt /mnt/boot/ $ mkdir -p /mnt/data $ mount /dev/vol/data /mnt/data $ lsblk # check if everything is fine $ # After bootstrapping Artix Linux into /mnt, don't forget to configure fstab! $ artix-chroot /mnt/ $ # Continue installing the system, skipping GRUB for the next section
GRUB Bootloader Installation & Configuration
This section assumes that you are already
$ pacman -S grub efibootmgr
mkinitcpio for encryption:
$ vi /etc/default/grub # Change the following: GRUB_CMDLINE_LINUX="... cryptdevice=UUID=[YOUR LUKS PARTITION UUID]" GRUB_PRELOAD_MODULES="part_gpt part_msdos lvm" GRUB_ENABLE_CRYPTODISK=y $ grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=grub
$ vi /etc/mkinitcpio.conf # Change the following: HOOKS=(.. lvm2 encrypt)
$ grub-mkconfig -o /boot/grub/grub.cfg
Make sure you run
mkinitcpio, do so by updating your kernel pacman will
update your initcpio automatically, or run this:
$ mkinitcpio -P
Congratz, you should have a true full disk encryption system!
Full disk encryption should not be hard to setup, try it out in a VM before converting all of your machines!