- Lab
- A Cloud Guru
Changing a LUKS Passphrase
In this hands-on lab, we will learn how to safely change the passphrase used on a LUKS-encrypted volume without losing the data on the volume. LUKS passphrases should be changed on a regular schedule, just like account passwords. *This course is not approved or sponsored by Red Hat.*
Path Info
Table of Contents
-
Challenge
Change the LUKS-Encrypted Volume Passphrase
- We first need to identify what volume
patient_lv
is part of. When a LUKS-encrypted volume is created, its original name includes the volume group name. Run the following command, and look fordevice
in the output:
sudo cryptsetup -v status patient_lv
- Run the following command to change the passphrase:
sudo cryptsetup luksChangeKey /dev/mapper/luks_vg-patient_lv
- Enter the original passphrase (
Pinehead1!
) at the prompt. - Enter the new passphrase (
Waddle4thewin!
) at the prompt. - Re-enter the new passphrase (
Waddle4thewin!
) to confirm.
- We first need to identify what volume
-
Challenge
Add a File Named `test.txt` to the LUKS-Encrypted Volume
- Determine where the
patient_lv
logical volume is mounted.
df -h
- Change to the
/data
directory.
cd /data
- Create a new file called
touch.txt
.
touch /data/test.txt
- Determine where the
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