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

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cryptsetup luksAddKey throwing 'Maximum keyfile size exceeded' error - fix? 14.04

I am attempting to add a homekey entry to my /etc/crypttab in order to prevent entering a 3rd pass upon login on a 14.04 install w/ LUKS (root/swap/home). When I attempt to add the key using ...
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4 views

Unlocking at boot time Luks LVM

This is my first question, but let me start by saying how much of a big fan I am up this site. Every question I ever had over the last 4 years has been answered here and I am so grateful for the help ...
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2answers
15 views

Mounting encrypted LUKS partition from Live CD

Error to begin with, can't boot I had to do a hard reboot of my computer, and when booting up it (initramfs I think) gave an error: mount: mounting /dev/mapper/ubuntu--vg-root on /root failed: ...
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9 views

Unlocking luks encrypted partition automatically Ubuntu 14.04

I've been trying to resolve an issue unlocking a luks encrypted partition on boot using Ubuntu 14.04. I've set it up to automatically unlock after the root partition's password has been entered by ...
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1answer
40 views

Mount external hard drive with LUKS Encryption + LVM

I recently switched to a bigger Hard Drive by running dd if=/dev/old of=/dev/new However now I am trying to get some files that changed after copying, so I connected the old Hard Drive over USB. The ...
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17 views

Thunderbird Profile on LUKS Encrypted flash drive not working

I want to store my Thunderbird profile on an encrypted USB flash drive and run it from there because I often switch between two computers with identical setups: Ubuntu 14.04 with the same user ...
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13 views

How do I encrypt my HDD and combine with my other encrpted HDD

I am trying to combine 2 HDD's. One of them is already encrypted and is my boot drive. The other one is not encrypted and Linux doesn't see it as more disk space. Could someone explain me how to do ...
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23 views

LUKS partition lost?

I'm starting to getting desperate about a partition encrypted with LUKS which is not recognized anymore. Here's what happend: Tried to resize partitions on sdb5 (lvm1 in crypt-container1). Made a ...
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31 views

Can't mount encrypted usb stick

I had a truecrypt encrypted usb stick, which I decided to reencrypt in LUKS through disk-utilities. I encrypted it, tested if I can mount it and put all my files on it. However, after a reboot I can't ...
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1answer
102 views

How do I get dropbear to actually work with initramfs?

Bounty Bounty Bounty Bounty! So I'm trying to unlock a headless server running an encrypted version of Ubuntu 14.04. It is a virgin 14.04.2 install with all updates as of writing. I went thtrough ...
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15 views

Cannot acces encrypted usb drive

So I had a USB stick encrypted by truecrypt but as it isnt supported anymore I decided to reformat it with disk-utilities in LUKS. I overwrote everything and formatted the drive with disk-utilities in ...
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1answer
73 views

Initramfs + Luks - only one password prompt

What I want to achieve: Being asked for a password, only once during boot time; The other (non-root) partitions to use the keyfile inside the /root/ directory. What I have achieved so far: (A) ...
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58 views

cryptsetup: unknown fstype, bad password, ect. Bug? Ubuntu 14.04.2

I can't log in to my system at first I had gotten the following error: cryptsetup: unknown fstype, bad password or options? Ubuntu spammed this at boot. Now I can't run the Ubuntu OS ...
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0answers
25 views

How can I repair my LUKS / ext4 file system?

my computer was running the whole night and my only open windows where IntelliJ IDEA and Google Chrome. Today my file system seems completely corrupted. Linux Mint can't read any files and folders ...
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0answers
69 views

How to resize a crypt-luks partition that takes all hard drive?

I want to shrink the partition to be able to install a windows OS, but i installed ubuntu 15.04 with encryption of the logical volume, gparted doesn't support crypt-luks so what do i do?
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2answers
67 views

how to lock LUKS partition from terminal?

I need to lock opened luks partition from terminal as normal user. in other words, I need terminal command do the same as sudo cryptsetup luksClose <name> but without root privileges. ...
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2answers
192 views

Encrypted SWAP partition creation after ubuntu 15.04 installation, 15.04 installer bugs!

Today I decided to install clean copy of 15.04. Using the installer partitioning tool, I created an encrypted luks system volume, then created an unencrypted SWAP, clicked continue, then got an error ...
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57 views

Plymouth script with LUKS Encryption

ive been hacking round with Plymouth themes on my Ubuntu 12.04 install and have noticed some strange behavior that I can't seem to explain (or solve) Note. I have two drives - both are encrypted with ...
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228 views

LUKS encryption over ecryptfs

My /home partition under Ubuntu is default encrypted (ecryptfs), but now the system isn't mounting it. Even worse, I don't even find the folder after encrypting for a second time with LUKS. This is ...
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40 views

Ubuntu fresh Luks/LVM Install “Operative System not Found”

I have a Dell Inspiron 7720 with two hdd, 1st: 1Tb and 2nd: 300Gb. The first hdd have Windows 8.1 Pro and i'm trying to install Ubuntu 14.04 LTS in the second. I made a fresh and clean install of ...
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0answers
61 views

Recover deleted full disk encryption partition

What I have: I have Xubuntu 14.04 installed on 500 GB HDD. The HDD consists of: Some small partition that seems to be for some EFI stuff a partition that holds /boot some free space at the end of ...
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32 views

How to disable “Remember forever” option in mounting encrypted disks

Whenever you mount an LUKS encrypted disk, Ubuntu gives you 3 options: Forget immediately Remember for this session Remember forever I wanted to know how to reset this choice after choosing the ...
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2answers
43 views

Encrypt second hard disk with same password

I installed Ubuntu 14 LTS with disk encryption (selected during installation). I have two questions: 1- What is encryption algorithm of current encrypted disk? 2- I have a second hard disk and I ...
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18 views

Dual boot with LUKS encryption with 2HDD's(Probably repeat)

As the header states, I am wondering it it's possible to do a FULL DISK encryption on my UBUNTU HDD while having windows on a COMPLETELY DIFFERENT HDD? Will Grub2 allow for this? If so.. How? ...
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153 views

LUKS encrypted FS can no longer be mounted after upgrading Kubuntu

everyone! I fresh installed Kubuntu 15.04 these days but before I copied my /home partition to a encrypted partition on my spare HD. The problem is that I can decrypt it but cannot mount the LVM no ...
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1answer
167 views

Encrypted filesystem shared with Mac OS X

Is there a reliable encrypted filesystem that works under both Mac OS X and Linux? It need not be the boot partition for either Linux or Mac OS X, but I'd like stable reads and writes if possible. ...
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133 views

Ubuntu does not boot successfully with btrfs root partition errors

I have a setup on my laptop in which there are three partitions relevant to Ubuntu: a ext4 /boot partition, a btrfs root partition on LUKS and a swap partition on LUKS. Sometimes, after an unclean ...
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1answer
948 views

Yubikey Two-factor Authentication Full-disk Encryption via LUKS

I recently acquired a Yubikey Neo - a nifty little hardware second factor authentication device. It's primarily intended for use with One Time Passwords, and the emerging U2F protocol - but since ...
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1answer
70 views

LUKS and loop device

I read a lot of tutorials about LUKS/dm-crypt/cryptsetup, in particular about how to create an encrypted file container. First step is to create the file with dd. Then some tutorials map the file to ...
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61 views

Change the default option to “Forget password immediately” when mounting a Luks usb drive

I would like to do exactly what this poster wants to do: When a LUKS encrypted partition pops up the unlock window it gives 3 options for how to remember the password. The "Remember password ...
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2answers
46 views

What information should I preemptively store to be able to recover encrypted data?

All of the posts that I can find regarding encrypted-data recovery regard specific situations. I currently have functioning partitions and directories, but would like to maximise my chances of ...
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3answers
201 views

Full Disk Encryption + Home folder encryption needed? Wouldn't Full Disk Encryption get the Home folder anyway?

I'm reinstalling Ubuntu, and want to do full disk encryption. After selecting it, I'm given a choice to also encrypt the Home folder. Since Ubuntu doesn't use a separate partition for the Home folder ...
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11 views

Ugrade to RAID5 with LUKS

I'm runninig Ubuntu 14.04 with a single disc (sda) and LUKS (sda1 is /boot, sda5 is /crypto_LUKS). I want now to add two additional discs (sdb and sdc) and build a RAID5 from the sda5 LUKS ...
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125 views

Lost LUKS partition, failed partition restore

and thanks for your time. I'm a bit over my head, so I think it's time to ask for help. I had a Tails USB drive, with a LUKS encrypted partition. I accidentally deleted the partition tables in ...
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1answer
170 views

Cannot enter password to start Ubuntu

I'm running Ubuntu 14.10 with the system disk encrypted with luks. When I start the computer, it shows the Ubuntu logo and asks to enter the password to unlock the disk. However, I cannot enter the ...
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1answer
113 views

Are there any advantages/disadvantages (if any?) in running luksFormat on raw drive (sdx) vs a partition (sdx1)?

I've been setting up a few LUKS encrypted drives and noticed that I've been creating the encrypted disk directly on the 'raw'(?) drive, ie. /dev/sdb, while many examples via google are showing it ...
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125 views

How to recreate encrypted dm-crypt/LUKS partition with predefined UUID on Linux?

I have / and swap area of Ubuntu 14.04 LTS encrypted in dm-crypt/LUKS. / and swap area reside in /dev/mapper/UUID_1 and /dev/mapper/UUID_2. Is it possible to recreate the /dev/mapper/UUID on the ...
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130 views

Migration from Truecrypt to LUKS

I am looking for an alternative for True-crypt which can be used both at the disk level and with portable media. Having installed Ubuntu 14.04 ticking 'with disc encryption' enabled, it works very ...
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118 views

Recovering GPT w/ encrypted partition

I have a removable HDD whose partition table became corrupted during an interrupted file transfer. The device should contain a GPT with a single ext4 partition encrypted by dm-crypt/LUKS. lsblk: ...
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3answers
695 views

clean install boot fails … ended up in BusyBox (initramfs) … a case for e2fsck

The computer gave me some strange errors like 'device not found' always while booting into Ubuntu, so tried to figure it out and used only the tips from this site to get a fast and secure virtual ...
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0answers
198 views

Recover Data from Encrypted LUKS HDD

Hei, I really need help with this! Yesterday my Kubutnu wouldnt boot anymore so I booted with a Live CD and could fix the problem with this Tutorial: ...
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1answer
289 views

Can Luks Be Used To Encrypt an NTFS Partition in Ubuntu?

(And then Boot into Full Windows With Luks Running Silently In the Background) I have a client that is completely unable to use Linux, but I was thinking maybe there was a way to setup their computer ...
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43 views

Encryption selected while installing Ubuntu but hard drive isn't encrypted

I have selected "encrypt new Ubuntu installation" on the Ubuntu 14.04 installer and typed in a passphrase setup. But after the installation was done my hard drive isn't encrypted. There is no ...
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0answers
116 views

After selecting Grub entry, screen switches to power save

After I select an entry (Ubuntu) from the Grub menu, the screen goes to power save mode. I could eventually get the screen asking me for the HDD encryption password by pressing Alt-F1 and then Alt-F7 ...
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66 views

Split encrypted Ubuntu installation into multiple encrypted partitions

I run a standard Ubuntu installation with LVM-Luks-based encryption which was set up by the installer. Now I would like to split this installation up since I want to use my home with another Ubuntu ...
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97 views

install with full disk encryption and a larger swap size

I have a laptop with 8GB RAM. When I install xubuntu and choose full disk encryption during the installer, it automatically creates an 8GB swap. I want to hibernate the computer, and if the RAM is ...
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0answers
506 views

How to restore a LUKS partition?

My /home partition disappeared on my main HDD. I changed SATA slots, then I got strange "no lvm available" errors during boot when usually the password would be entered (I do not have any lvm setup at ...
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728 views

How to recover encrypted LUKS lubuntu data?

I installed lubuntu 13.10 with encryption from the CD and then updated to 14.04 when it became available. Now booting up fails. My hard drive has at least two partitions, one boot and one LUKS ...
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1answer
547 views

How do you restore an encrypted hard drive? Password being available

Installed by Ubuntu 14.04 LTS Installer: I have installed Ubuntu 14.04 LTS Desktop onto my notebook PC, and I made a wrong decision to alter the file ownership and permissions from the root drive as ...
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1answer
50 views

“Corrupted shell” after cryptdisks_start

I've been using luks encryption for USB backup drives for years with no problems, but now I have some strange behaviour. The difference is that here the whole system (except /boot) is on LVM over luks ...