Questions tagged [luks]

All questions relating to LUKS (the disk-encryption specification) for Linux

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Unallocated space instead of LUKS partition with gparted

I have unplugged a USB with valuable data with a mounted LUKS partition which destroyed the partition table. Running testdisk does not recognized the partition: it claim it as unallocated space ...
user203771's user avatar
5 votes
1 answer
6k views

Reinstall to existing encrypted partitions

My disk layout is like this: Encrypted partition for / Encrypted partition for /home Unencrypted partition for /boot I set this up last time I did a complete reinstall (incl. wiped disk) of Ubuntu a ...
decibyte's user avatar
  • 356
1 vote
1 answer
290 views

Swap not working with lvm on luks

I've installed new Ubuntu 16.10 with LVM on LUKS using this instruction: (https://askubuntu.com/a/293029). But when I type swapon -s I get: Filename Type Size Used ...
danielleontiev's user avatar
3 votes
2 answers
2k views

Does strength of LUKS encryption key directly depend on password?

I've set up a fresh installation of Ubuntu 16.04 and enabled full disk encryption using LUKS during installation. Since the correct key map for my locale was not available yet, I entered a really ...
caw's user avatar
  • 396
1 vote
0 answers
189 views

Why can't I unlock an image recovery of my encrypted disk, despite using the correct password?

My understanding of the Linux encryption protocol is that the keys are "distributed" over the entire disk, so even a tiny amount of damage can cause a significant amount of casualty. In particular, ...
nick carraway's user avatar
3 votes
1 answer
10k views

How to find UUID for setting up LUKS with keyfile protection for external drive

I have my external drives setup with LUKS + password. I would like to increase the security to password + keyfile. For internal storage this seems to be trivial but I'm not sure how to approach this ...
Max Gordon's user avatar
9 votes
2 answers
17k views

How to repair /boot on LUKS encrypted harddrive?

I have a laptop with Xubuntu installed. At install I chose the full disk encryption option. But yesterday i accidentally dd-ed a DSL image to sda1 (/boot partition) instead to sdb1 (pendrive). How ...
Pentagon98's user avatar
0 votes
1 answer
150 views

Ubuntu 16.04 - switching from nouveau to closed source driver, after LUKS auth purple screen

When I change my nvidia graphic card drivers from nouveau to the closed source, tested driver, everything works fine. Right after a reboot I do not get past the LUKS auth screen. The window stays ...
Max's user avatar
  • 155
0 votes
1 answer
1k views

Full disk encryption on GPT on BIOS problems

How to encrypt all data on hard drive (including /boot and 1MB BIOS boot partition)? How to create GRUB bootable BIOS partition with encryption? My HDD is empty now. I cannot use this laptop now.
Stanislav Mikhaylenko's user avatar
3 votes
1 answer
1k views

Able to mount but not able to view the contents of LUKS-encrypted flash drives

I've formatted multiple flash drives on multiple computers using the Gnome Disk Utility on Ubuntu 16.04, each with a Ext4/LUKS partition. All is fine on the machine used to format them, but I'm unable ...
Blizzy's user avatar
  • 31
2 votes
1 answer
5k views

Resizing an encrypted LUKS partition using the KDE Partition Manager

Following an answer in this post I tried resizing (with the KDE Partition Manager) a LUKS encrypted partition created during the installation of Ubuntu. I booted from a Linux live USB stick and ...
Roegel's user avatar
  • 23
3 votes
2 answers
5k views

Unlocking LUKS partition with keyfile on USB does not work

I partially followed this What is /lib/cryptsetup/scripts/passdev actually doing? /etc/crypttab 2tb UUID=... /dev/disk/by-label/STICK:/logfile luks,nofail,keyscript=/lib/cryptsetup/scripts/passdev,...
redanimalwar's user avatar
  • 1,550
2 votes
1 answer
712 views

Recovering a LUKS Ext4 Partition that was over written

I have a external HDD that was formatted as one 2TB Ext4 partition and LUKS encrypted. It was turned into an ubuntu install disk using start disk creator. Is there anyway that this can be recovered?
user608213's user avatar
2 votes
0 answers
1k views

Volume group not found after updating to 16.04.1 LTS

I updated from 14.04 to 16.04.1 LTS and now my LUKS volumes will not mount and the system will not boot. I'm not sure where to go from here... I can use a live CD to get access to the filesystem.
Oenotria's user avatar
  • 151
0 votes
1 answer
2k views

'Check that kernel supports aes-xts-plain64 cipher' after upgrading to Ubuntu 16.04.1 LTS

I upgraded my system from 14.04 LTS to 16.04.1 LTS and now it won't boot. I am using LUKS encryption - during the boot I now get this error: Check that kernel supports aes-xts-plain64 cipher After ...
Oenotria's user avatar
  • 151
12 votes
1 answer
24k views

How to mount LUKS encrypted file?

I have a file (about 13GB). When I execute the command file "filename" in terminal, It shows tails_filesystem: LUKS encrypted file, ver 1 [aes, xts-plain64, sha1] UUID : blahblah And, when I mount ...
Jensen's user avatar
  • 123
2 votes
1 answer
518 views

Cloning an encrypted HDD

How can I easily clone an encrypted HDD that is running Ubuntu 16.04 with LUKS encryption? I want to be able to move my install from my current desktop to a laptop, so I can't just physically move my ...
scorchiepoo's user avatar
0 votes
1 answer
1k views

Pendrive formatting to ext4/LUKS problem

I've just mount new pendrive with msdos fs on it, and i tried formatting it to Luks/Ext4. How i tried : Files -> right click on penrive -> format.. : Erase : Overwrite existing data with zeros Type ...
Krzysiek Witkowski's user avatar
4 votes
1 answer
2k views

Stuck in initramfs with btrfs root array

I am trying to setup a system with three drives with a btrfs raid1, however I get stuck in initramfs if I have more than a single drive in my btrfs root. My three partitions: /dev/mapper/sda3_crypt | ...
BinaryShrub's user avatar
0 votes
1 answer
484 views

Latest compiz update for 16.04 breaks desktop + LUKS login

I just upgraded to the latest update for compiz and other packages, but that resulted in me not having access to a desktop at all! (can only see background and cairo dock). I figured it was unity/...
Wboy's user avatar
  • 345
0 votes
1 answer
2k views

Getting lsinitramfs to boot into an encrypted file system

I followed the directions here. I've been using the LiveCD and I cannot for the life of me persuade Ubuntu to create a initramfs file that would be willing to decrypt my LUKS file-system. I'm having ...
ohmysql's user avatar
  • 11
2 votes
0 answers
1k views

Decrypt multiple drives with a single password? (LUKS+LVM)

Specifically to be able to rearrange the LUKS volumes without touching physical partitions. (I'm willing to start from scratch) Background: Currently I have LVM on top of LUKS. A password unlocks ...
iPherian's user avatar
  • 133
1 vote
1 answer
940 views

Ubuntu with ZOL and LUKS

I'm trying to install ZOL with LUKS and I'm not entirely sure how to proceed. I've plenty of material on how to get ZOL installed to the root of my target media. However, there's not much on getting ...
Casey Weed's user avatar
0 votes
2 answers
2k views

LUKS LVM device mapped by UUID instead of e.g. sda5_crypt

I have a laptop with what I believed to be basic LUKS single-disk from a fresh 14.04 install. After updating to 16.04, I found my initrd had no LUKS support so I couldn't boot. The culprit seems to ...
covener's user avatar
  • 111
5 votes
2 answers
4k views

How to securely mount LUKS partition at login?

I want to access a LUKS encrypted data partition after login, ideally without typing a password, obviously in a secure way. My home directory is also encrypted with LUKS. I found this tutorial: ...
Victor Lamoine's user avatar
12 votes
1 answer
9k views

How does LUKS work?

I was just curious if someone had a high level overview of how a system like LUKS worked for full disk encryption, aka. how it stores keys and how those keys are verified, and if data is de-crypted by ...
fritz's user avatar
  • 121
2 votes
1 answer
5k views

Ubuntu + Luks: Volume Group 'vgcrypt' not found (drop to busybox)

Problem: I followed the intructions for installing Ubuntu 16.04 over an EFI system with LUKS+LVM of this upvoted question on AskUbuntu, but I ended up with a somewhat unusable system. The only thing ...
J. Doe's user avatar
  • 21
3 votes
4 answers
10k views

boot - no LUKS password prompt

During boot, I am not asked for LUKS password, so boot fails. Same behavior with failsafe grub option, so no CLI password prompt either. I have: initrd.img-3.13.0-39-generic initrd.img-3.13.0-40-...
PeTer's user avatar
  • 31
1 vote
1 answer
1k views

Ubuntu 16.04 LUKS passcode does not appear

I installed an encrypted version of Ubuntu on my PC. If I start my computer appears this login screen: I'm unable to type in the passcode. Nothing appears. Also if I type in the correct passcode and ...
phathe's user avatar
  • 21
5 votes
1 answer
4k views

Why does Ubuntu's full disk encryption require no time?

As far as I understand, the "Encrypt the new Ubuntu installation for security" option in the Ubuntu installer is meant to provide full disk encryption. However, when using that option, it seems like ...
nw9165-3201's user avatar
0 votes
0 answers
637 views

Can initramfs mount multiple partitions?

We're using dm-crypt to encrypt a data disk and would like to use Mandos to facilitate unattended boot. Unfortunately, I'm to understand that: Mandos depends on the keyscript feautre of crypttab, ...
claytond's user avatar
  • 111
2 votes
1 answer
5k views

How to mount a luks encrypted partition at boot

I have been given a task to creat a LUKS encrypted partition and then mount it, here are the steps I followed: Create the partition for encryption: sudo fdisk /dev/sda Reboot Format the partition ...
George Udosen's user avatar
0 votes
1 answer
976 views

Ubuntu16.04 suddenly boots to a text-only (initramfs) prompt, restoring superblock doesn't fix it

So I thought I had faced the typical problem of getting a superblock corrupted (which I think happened because of an intended hard/unclean reboot). However after following the guide in the first ...
knocte's user avatar
  • 996
0 votes
1 answer
925 views

LVM encrypted LUKS on SSD - issue reverting to snapshots

Ubuntu 14.04.4 LTS SSD is only drive (/dev/sda) /dev/sda1 is boot partition /dev/sda5 is encrypted LUKS partition logical volumes sit on top of the LUKS partition Reverting to snapshots seems to work ...
jub's user avatar
  • 141
2 votes
1 answer
924 views

When is LUKS encrypting my data?

Assuming I have a partition encrypted with LUKS, which I mount and read from and write to. My question is when is the data encrypted? When I write it or when I unmount the partition? Also, what ...
Young Griff's user avatar
0 votes
1 answer
5k views

How to get Plymouth working with LUKS encryption after NVIDIA driver installation?

When I first set my computer up with LUKS encryption, during boot, right after Grub2, Plymouth takes over and you get a nice graphical screen with the prompt to enter the passphrase. And that screens ...
jub's user avatar
  • 141
0 votes
2 answers
2k views

How safe is luks?

I constantly think about encryption, and how safe it might be. The general information I have tends to be secured by passwords that range in the hundreds with random key combinations in between random ...
Roman556's user avatar
1 vote
0 answers
699 views

Custom encrypted partitions using 16.04

I have installed Ubuntu 16.04 Desktop using this guide. I have an unencrypted boot partition and a separate LVM partition which contains my root, home and swap partitions. If I boot from a live USB, I ...
Nevstah's user avatar
  • 31
1 vote
2 answers
2k views

14.04.3 LTS + xenial kernel upgrade + nvme SSD - won't boot

I have a 14.04.3 LTS system that won't boot after upgrading to 4.4.0-24 kernel (xenial kernel image packages). It has an NVME SSD, and with the 4.4 series kernel, it can't seem to see the NVME. The ...
cuvy's user avatar
  • 295
2 votes
2 answers
8k views

Won't boot (drop to busybox) after kernel upgrade (with encrypted disks)

I have two systems - a 14.04.03 LTS and 16.04 LTS, both of which are not booting after recent kernel upgrades. Any help would be appreciated - I'm no expert, but it seems to me like the new kernel ...
cuvy's user avatar
  • 295
1 vote
0 answers
2k views

Can't boot into ubuntu with LUKS. System hangs at "cryptsetup: sda5_crypt set up successfully""

I've looked at a couple methods but this is all new territory for me. Workflow: I boot up my machine, then I'm asked for my pass phrase, I successfully enter it and I get the "cryptsetup: sda5_crypt ...
user avatar
1 vote
1 answer
5k views

Black screen after grub or at reboot with LUKS encryption

I know this subject was already treated, and I found a "fix" to bypass this black screen thanks to this answer (LUKS encyption part): My computer boots to a black screen, what options do I have to fix ...
Slot's user avatar
  • 111
1 vote
0 answers
82 views

Freshly installed Ubuntu boots into initramfs

a few days ago I installed Linux Mint but had no luck getting wifi working so I switched over to Kubuntu. Everything was working fine and finally after some days of tweaking I had everything setup ...
initramfsshit's user avatar
3 votes
1 answer
505 views

Ubuntu saying "Volume group ubuntu-vg not present" before prompting for password

Ubuntu 16.04 isn't prompting for my luks password. I pressed ctrl+alt+F1, and the output says "Volume group ubuntu-vg not present." Of course not! I haven't been asked for my password! ubuntu-vg ...
Gabriel Curio's user avatar
0 votes
2 answers
1k views

Recovering an Encrypted Home Partition Overwritten by LUKS

After aborting a recent installation attempt of Ubuntu 16.04 (which I've since installed without a separate home partition), I discovered that my existing encrypted home partition is no longer ...
user66362's user avatar
0 votes
1 answer
305 views

Enlarging luks partition

I'm getting new SSD disk soon and want to dd my old disk to new one. My disk is fully encrypted and using LVM. My new disk will be twice ad big as I have now. I was wondering how to use remaining ...
piotrekkr's user avatar
  • 513
1 vote
1 answer
2k views

Mount LUKS encrypted hard drive at boot (luks key stored in HOME folder which is encrypted by ecryptfs)

This question is regarding the one raised at: Mount LUKS encrypted hard drive at boot I have added my key to home folder and all works as a charm. Thanks guys! However I would like to better ...
Gabriel's user avatar
  • 11
4 votes
2 answers
5k views

LVM & LUKS manual partitioned but issues with loader/init/grub

I've had some success with manually partitioning and installing LVM & LUKs. The partitions are created - home, root, swap and boot, the pv and vg's were all created and set up correctly. I ...
user81084's user avatar
4 votes
1 answer
3k views

Cloning full-disc-encrypted system unencryptedly onto new disc

Essentially, I'm following this answer to clone the unencrypted content of a system with full-disc encryption to a new (smaller) SSD, from a live stick. I thought that would just consist of mapping ...
phipsgabler's user avatar
4 votes
1 answer
2k views

How do I render Ubuntu unusable by deleting the full disk encryption key?

I have an old computer that I'm ready to get rid of that has been encrypted using LUKS full disk encryption. Is it possible to delete the encryption key from the LUKS metadata so that nobody will ever ...
TwentyMiles's user avatar