Change Passphrase with Cryptsetup

September 26, 2020

You could change your passphrase within one step with the luksChangeKey command, but if you want to make sure you made no typo, I would prefer to use two steps.

First add a new passphrase to your volume.

cryptsetup luksAddKey /dev/<device>

Then remove your previous passphrase.

cryptsetup luksRemoveKey /dev/<device>

Source: https://wiki.archlinux.org/index.php/Dm-crypt/Device_encryption#Key_management