How to enable full disk encryption after install? #58
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Benjamin_Loison (Benjamin Loison)
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Reference: Benjamin_Loison/linux#58
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Block a user
Would help Benjamin-Loison/cinnamon/issues/179.
Wikipedia: Linux Unified Key Setup (1239229939) may help.
Reading:
would also help.
+10
Related to Benjamin_Loison/ecryptfs/issues/8.
Wikipedia: Linux Unified Key Setup#Examples (1239229939) may help otherwise I read completely this article.
gpartedhelps?Can try in a virtual machine first.
Let us try from a fresh Linux Mint 22.1:
Screenshot_Linux_Mint_2025-01-18_15:58:46.pngdoes not request an encryption password and rebooting leads to usual login prompt.DuckDuckGo search Linux Mint enable full disk encryption after install.
Could investigate the documentation of:
cryptsetup reencryptcryptsetup-reencryptBacking up before encrypting seems safer.
As there is a decryption screen, there is no need to take screenshots how to access the disk from another system.
However, a final screenshot once encrypted of
gpartedto show that it is encrypted would be nice.https://forums.linuxmint.com/viewtopic.php?t=391261 seems more about not identical backup and restore.
The Ask Ubuntu answer 369623 states quickly that it is not possible.
Source: luksipc/blob/e222ca7ff89e7465345c8ae8786096130e06a30f/README.md?plain=1#L7-L11
Source: the Ask Ubuntu comment 2501628
Let us figure out why I faced above in https://gitea.lemnoslife.com/attachments/f3fda48c-04fc-4a5c-ac80-d884d6cde31c:
Output:
DuckDuckGo and Google search
"cryptosetup-reencrypt"and"cryptosetup-reencrypt" "apt".https://man7.org/linux/man-pages/man8/cryptsetup-reencrypt.8.html
On my Debian 12 GNOME work laptop:
https://command-not-found.com/cryptsetup-reencrypt
cryptsetup
The Ask Ubuntu question 1445879 faces the same issue as me.
https://bugs.launchpad.net/ubuntu/+source/cryptsetup/+bug/2014228/comments/5 seems to recommend instead
cryptsetup reencrypt.even if
sudo.On my Debian 12 GNOME work laptop:
Output:
Based on above Ask Ubuntu answer:
wiki.archlinux.org: dm-crypt/Device encryption#Encrypt an existing unencrypted file system (824010)
Is not shrinking the most heavier than shrinking the least possible.
Output:
Should investigate:
https://cryptsetup-team.pages.debian.net/cryptsetup/encrypted-boot.html
What about Debian 12 GNOME to just encrypt ext4 with LUKS without LVM?
This would help the person:
See the Tchap message where the person states not needing it finally by proceeding to a reinstall:
Output:
Output:
Output:
does not request a password or output anything, same for
/dev/vda1and it does not return change anything during reboot.Let us try from a live ISO. Does not help
cryptsetup reencrypt.Output:
Output:
Output:
Output:
Output:
Output:
On my Debian 12 GNOME laptop:
/etc/fstab:/etc/crypttab:/mnt/etc/fstab:/mnt/etc/crypttab:Output:
Replacing in
/mnt/etc/fstab0e9a3032-7390-4a7f-8073-e690fc58839awith4ce57ca1-ca7c-4b06-abb8-eb0892d6897edoes not help booting.Let us try:
/etc/fstab:/etc/crypttab:Even if I ended up making it work the other person:
is not interested as I explain him the dis/advantages, see issues/22#issuecomment-2956.
I may have an issue with the boot partition.
Above configuration is still stuck on SeaBIOS.
/mnt/etc/mkinitcpio.confdoes not exist.Should test with:
/etc/mkinitcpio.conf:wiki.archlinux.org: Mkinitcpio#Image creation and activation (823193) makes me believe that
mkinitcpiois Arch specific.wiki.archlinux.org: Dm-crypt/System configuration#Unlocking in late userspace (822797) may help.
Improve_websites_thanks_to_open_source/issues/967 would help.
See calendar event of 04/02/25 at 14:00 to encrypt my cloud VMs.
Could reinstall OVH VPS to activate encryption but this is too heavy.
The person:
does not know how to do so and would be interested in doing so. It is still the case as of 21/10/25, source: oral physically.
Maybe can somehow access raw ext4 in encrypted container, then just copy with
dd. Just copying files and folders from/does not seem very correct to me, but may be.DuckDuckGo and Google search Ubuntu full disk encryption after install.
I quickly have read johndoe31415/luksipc/issues/{13,12}. In the latter johndoe31415/luksipc/issues/12#issuecomment-256700470 may be especially useful. Other issues and pull requests do not seem relevant based on their titles and there is no wiki.
https://johndoe31415.github.io/luksipc/testing.html may be interesting but does not manage root partition case.
Source: https://opencraft.com/tutorial-encrypting-an-existing-root-partition-in-ubuntu-with-dm-crypt-and-luks/
On Debian 12 GNOME laptop Virtual Machine Manager Ubuntu (trust) virtual machine:
Output:
Output:
I doubt that it means UEFI being supported but let us try anyway.
Well this is 2 red flags, so let us stop.
Same Firmware on Debian (trust).
On Oracle Cloud free ARM VPS:
Source: the Ask Ubuntu answer 162896
DuckDuckGo search Linux check if booted with UEFI.
https://www.ovh.com/manager/#/dedicated/vps/vps713872.ovh.net/dashboard does not seem to help switching to UEFI.
DuckDuckGo search OVH Boot UEFI.
On Debian UEFI virtual machine:
From a virtual live USB:
Output:
Face Benjamin_Loison/virt-manager/issues/84.
Output:
Output:
Should try without
--typeif it works fine.Output:
Output:
Output:
Bash script:
does not return anything.
Are all these mounts necessary?
Let us verify this fact.
So this does not seem expected.
Output:
Should investigate the permissions given.
/etc/crypttab:should investigate
discardmeaning.Initial
/etc/fstab:I added:
there was no such reference.
Initial
/etc/default/grub:I added:
Output:
I guess that the second line is due to live USB key.
In another shell:
Output:
/boot/grub/grub.cfg:I have not verified the random part but there blue rectangles match above.
Output:
Should verify these parameters.
Output:
Output:
I disabled installing pending updates when requesting on graphical shutdown.
no matter if I have provided the correct or incorrect password.
Testing on an actual computer may help, can
ddto ease resetting the unencrypted disk state.Note that I have an ad-hoc SATA SSD for such tests on my computer Pegasus.
Should investigate:
Does it actually preserve files and folders on ext4, once encrypt it? I would say so, see:
Tracked at Benjamin_Loison/ext4/issues/5.
Should read Wikipedia: Disk encryption.
Would help Benjamin_Loison/Ubuntu/issues/17.
https://ubuntuhandbook.org/index.php/2024/08/encrypt-existing-ubuntu-system/ looks promising but use a snapshot according to https://discourse.ubuntu.com/t/24-04-disk-encryption-not-available-during-install-if-using-a-partition-and-not-full-disk/55238/8.
https://ubuntuhandbook.org/index.php/2024/08/encrypt-existing-ubuntu-system/#comment-3758446 may help. However, above issue comments do not seem to face initramfs but grub.
Both on my Debian 12 GNOME laptop the Ubuntu
/boot/does not seem to have its specific partition and the Virtual Machine Manager Ubuntu (trust) virtual machine does not seem to have a/boot/partition too.So maybe can first proceed in a virtual machine even if it asks twice the password, then I'll try to add a workaround, as mentioned in https://ubuntuhandbook.org/index.php/2024/08/encrypt-existing-ubuntu-system/#comment-3757645, not to.
Well it does not seem to just be a question of asking twice the password but just following the tutorial.
https://ubuntuhandbook.org/wp-content/uploads/2024/08/encrypt-prepare.webp
Could search how to start using a partition as the tutorial for
/boot/.Would help:
Related to Improve_websites_thanks_to_open_source/issues/1828.
Source: https://wiki.extinctionrebellion.fr/books/securite-militante/page/securite-de-lordinateur-1-saisie-par-la-police
https://www.privacyguides.org/en/encryption/#picocrypt-file should be removed in my opinion, as:
https://www.privacyguides.org/en/encryption/#veracrypt-disk
https://veracrypt.fr/code rediretcs to https://veracrypt.io/Code.html while https://veracrypt.io/en/Code.html is the working URL.
Related to Benjamin_Loison/mintstick/issues/3.
The person mentioned in https://pim.etesync.lemnoslife.com/pim/events/KZ_e7ykAkYyWD3ECaZgHyCYAweZhp_Rm|TFIQDQixnGy1vr5mjDZX9u2XL1IcBS8i is reinstalling Ubuntu for this reason, knowing the existence of
ecryptfs-migrate-home.