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Accepted
Adam Matan
Asked: 2011-01-12 02:18:49 +0800 CST

Mount a LUKS partition at boot

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I have installed an Ubuntu machine with two encrypted LUKS partitions: one for / and one for /home.

I've reinstalled the machine to upgrade to 10.04. Again, the / is installed using LUKS, and I'm able to mount the /home using:

mkdir /media/home
sudo cryptsetup luksOpen /dev/sda2 home
sudo mount -t ext3 /dev/mapper/home /media/home

The problem is, this cryptfs mapper disappears after boot, so I putting the appropriate line in fstab fails.

How do I set the cryptfs to prompt for password and unlock the drive at boot?

Thanks,

Adam

10.04

2 Answers

  1. Best Answer

    Seems that I needed to edit the /etc/crypttab file, which is the crypto equivalent to fstab, and add the following line:

    # create a /dev/mapper device for the encrypted drive
home    /dev/sda2       none luks

    And add the following to /etc/fstab:

    # /home LUKS
/dev/mapper/home /home ext4 rw 0 0

    Now I get two password prompts at boot, as needed.

    • 17

  2. I had the same problem!! However, everything is taken care of after this command! You should try it out :-)

    sudo update-initramfs -u -k all
    • -3