List open dm-crypt LUKS volumes

Question

If I mount a simple loop device,

losetup -a

give me the devices opened. Is something similar possible with cryptsetup?

score 41 · Accepted Answer · edited Nov 27 '19 at 00:28

41

dmsetup is useful for anything device mapper related. For Example:

[root@localhost]~# dmsetup ls --target crypt
luks-90dc732d-e183-4948-951e-c32f3f11b305   (253, 0)
[root@localhost]~#

edited Nov 27 '19 at 00:28

Cristian Ciupitu

answered Feb 18 '15 at 01:45

Bratchley

4

Is there any way to list all mappings with their target type? The best I could manage was `for i in $(sudo dmsetup targets | cut -f1 -d' '); do echo $i:; sudo dmsetup ls --target $i; echo; done` – mwfearnley Apr 05 '18 at 09:49
8

Thx. Getting the list shouldn't be so _cryptic_... `luksList` would be nice. – bvj Apr 18 '19 at 05:31

score 31 · Answer 2 · answered Sep 17 '19 at 13:43

31

I just looked for the same thing, a list of my luks partitions, though I wanted a mapping to the physical /dev/sdX devices.

lsblk --fs

answered Sep 17 '19 at 13:43

kaefert

8

Just a friendly reminder that `lsblk` supports `-J` or `--json` to output the result in a machine readable format. Which can be useful when doing a reverse lookup of dmcrypt mapper devices *(`/dev/sda` -> `luksloop` for instance by iterating the `/dev/sda` children object)*. – Torxed Mar 14 '21 at 11:53

2 Answers2