Unmount Cryptsetup Disk

Lock Encrypted Disk

To unlock disk, you simply use luksClose argument followed by the LUKS mounting name. The syntax is as follows:

$ cryptsetup luksClose <mounting name>

Example:

$ cryptsetup luksClose sda_crypt

Verify Unlock Outcome

Once mounted, you should not see the mapper device inside the mapper section like:

/dev/mapper/<mounting name>

If we follows the example above, we should not see:

/dev/mapper/sda_crypt

That's all for unmounting cryptsetup disk.