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Recover Data from Encrypted File Systems
In this exercise, you will recover an encrypted LUKS partition by using a backup LUKS header file. *This course is not approved or sponsored by Red Hat.*

Lab Info
Table of Contents
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Challenge
Unlock the encrypted device.
Review the contents of
/etc/crypttab
:cat /etc/crypttab
Check the mounts with
lsbkl
:lsblk
Review the contents of
/etc/fstab
:cat /etc/fstab
Attempt to mount
/luks
:mount /luks
Look for the unlocked device in
/dev/mapper
:ll /dev/mapper
Attempt to open manually:
cryptsetup luksOpen /dev/mapper/vg_1-lv_1 luks-vg_1-lv_1 --key-file /root/passphrase.key
View the key slots:
cryptsetup luksDump /dev/mapper/vg_1-lv_1
No key slots are in use. Locate the header backup in
/root/
:ll /root/
Restore header file:
cryptsetup luksHeaderRestore /dev/mapper/vg_1-lv_1 --header-backup-file /root/vg_1-lv_1.header
Type uppercase YES.
Attempt to open manually again (using same key and name as
/etc/crypttab
:cryptsetup luksOpen /dev/mapper/vg_1-lv_1 luks-vg_1-lv_1 --key-file /root/passphrase.key
Verify unlocked device:
ll /dev/mapper
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Challenge
Mount the encrypted device.
Mount the unlocked device:
mount /luks/
View the files on the device:
ll /luks/
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