---
name: "cryptsetup-isLuks"
section: "8"
platform: "linux"
package: "cryptsetup"
version: "2.8.8-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/cryptsetup-isLuks"
---

# cryptsetup-isLuks(8)

check if a device is a LUKS device

## NAME

cryptsetup-isLuks - check if a device is a LUKS device

## SYNOPSIS

**cryptsetup** *isLuks* **\[\<options\>\] \<device\>**

## DESCRIPTION

*Returns true if \<device\> is a LUKS device, false otherwise.*

*Use option -v to get human-readable feedback.* *'Command successful.' means the device is a LUKS device.*

*By specifying --type, you may query for a specific LUKS version.*

**\<options\>** *can be \[--header, --type, --disable-locks\].*

## OPTIONS

**--batch-mode***,* **-q**

*Suppresses all confirmation questions.* *Use with care!*

*If the --verify-passphrase option is not specified, this option also switches off the passphrase verification.*

**--debug** *or* **--debug-json**

*Run in debug mode with full diagnostic logs.* *Debug output lines are always prefixed by* **#***.*

*If --debug-json is used, additional LUKS2 JSON data structures are printed.*

- **--disable-locks**

  *Disable lock protection for metadata on disk.* *This option is valid only for LUKS2 and is ignored for other formats.*

  **WARNING:** *Do not use this option unless you run cryptsetup in a restricted environment where locking is impossible to perform (where /run directory cannot be used).*

**--header** *\<device or file storing the LUKS header\>*

*Use a detached (separated) metadata device or file where the LUKS header is stored.* *This option allows one to store the ciphertext and LUKS header on different devices.*

*For commands that change the LUKS header (e.g., luksAddKey), specify the device or file with the LUKS header directly as the LUKS device.*

**--help***,* **-?**

*Show help text and default parameters.*

**--type** *type*

*Specifies required device type, for more info, read the BASIC ACTIONS section in* **cryptsetup***(8).*

- **--usage**

  *Show short option help.*

**--verbose***,* **-v**

*Print more information on command execution.*

**--version***,* **-V**

*Show the program version.*

## REPORTING BUGS

*Report bugs at* *cryptsetup mailing list \<cryptsetup@lists.linux.dev\>* *or in* *Issues project section \<https://gitlab.com/cryptsetup/cryptsetup/-/issues/new\>.*

*Please attach the output of the failed command with --debug option added.*

## SEE ALSO

*Cryptsetup FAQ \<https://gitlab.com/cryptsetup/cryptsetup/wikis/FrequentlyAskedQuestions\>*

**cryptsetup***(8),* **integritysetup***(8) and* **veritysetup***(8)*

## CRYPTSETUP

*Part of* *cryptsetup project \<https://gitlab.com/cryptsetup/cryptsetup/\>.*