LUKS, the Linux Unified Key Setup, is a standard for disk encryption. In the “Installation type” options choose “Something Else” and the manual partitioner will start: Note that if you don’t declare a swap partition, the installer will create a swapfile, but for btrfs this needs to be in its own subvolume (otherwise we cannot take snapshots of @). Note that “boot” snapshots will not be created directly but about 10 minutes after a system startup. If you did not create a swap partition above, Ubiquity created a swapfile for you. Let’s restrict the pattern of keyfiles and avoid leaking key material for the initramfs hook: These commands will harden the security options in the intiramfs configuration file and hook. You can follow any responses to this … However, this option forces you to wipe your entire disk, which is not an option if you already have another operating system installed, such as Windows. Return to the terminal and create a chroot (change-root) environment to work directly inside your newly installed operating system: Now you are actually inside your system, so let’s mount all other partitions and have a look at the btrfs subvolumes: Looks great. This may already be installed. I'm (Tj) being deliberately pedantic in calling this almost Full Disk Encryption since the entire disk is never encrypted. For more information see the man-pages for 18.04 Bionic or 18.10 Cosmic onwards. Instead of these steps you can just press Ctrl+Alt+T hot-key combination. The process behind this fairly simple. It may make it explicit that one is "UEFI" and the other not, or it may use some hard-to-spot code such as a single letter abbreviation (e.g. The reason is the Ubuntu Installer would only create partitions 1 and 5. Syntax: --new=:: where start and end can be relative values and when zero (0) adopt the lowest or highest possible value respectively. Choose the one you like more. GRUB only supports opening version 1 so we have to explicitly set luks1 in the commands we use or else GRUB will not be able to install to, or unlock, the encrypted device. 18.04 used version 1 ("luks1") but more recent Ubuntu releases default to version 2 ("luks2"). If you have other partitions, check their types and use; particularly,deactivate other EFI partitions. There are plenty of reasons why people would need to encrypt a partition. This is due to the fact that Btrfs Async Discard Support Looks To Be Ready For Linux 5.6 is quite new, but 20.04 still runs kernel 5.4, it is better to enable the fstrim.timer systemd service: Open a terminal and install some dependencies: Install Timeshift and configure it directly via the GUI: Timeshift will now check every hour if snapshots (“hourly”, “daily”, “weekly”, “monthly”, “boot”) need to be created or deleted. Network-bound disk encryption allows unlocking LUKS devices (e.g. There you go, you have an encrypted swap partition. In that configuration ext4 filesystem is created directly on the LUKS … Cryptsetup is the tool we will use to setup LUKS encryption… Published with Step 1: Boot the install, check UEFI mode and open an interactive root shell, Create luks1 partition and btrfs root filesystem, Step 3 (optional): Optimize mount options for SSD or NVME drives, Step 4: Install Ubuntu using the Ubiquity installer without the bootloader, Create a chroot environment and enter your system, Add a key-file to type luks passphrase only once (optional, but recommended), Step 6: Reboot, some checks, and update system, Step 7: Install Timeshift, timeshift-autosnap-apt and grub-btrfs, Recovery and system rollback with Timeshift, Btrfs Async Discard Support Looks To Be Ready For Linux 5.6, Things to do after installing Pop!_OS 20.04 (Apps, Settings, and Tweaks), Ubuntu 20.04 with btrfs-luks-RAID1 full disk encryption including /boot and auto-apt snapshots with Timeshift, a btrfs-inside-luks partition for the root filesystem (including, either an encrypted swap partition or a swapfile (I will show both), an unencrypted EFI partition for the GRUB bootloader, automatic system snapshots and easy rollback similar to, a 512 MiB FAT32 EFI partition for the GRUB bootloader, a luks1 encrypted partition which will be our root btrfs filesystem. 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