LUKS

Decrypt the LUKS partition and reveal the underlying virtual device(s):

cryptsetup luksOpen /dev/[PARTITION] [VIRTUAL_PARTITION_NAME]

Remove the virtual device(s):

cryptsetup luksClose [VIRTUAL_PARTITION_NAME]

Info

The VIRTUAL_PARTITION_NAME can be whatever name you want to use for the virtual device associated with the decrypted partition.

Change the LUKS encryption passphrase:

cryptsetup luksChangeKey /dev/[PARTITION]