CRYPTSETUP-CONFIG(8) Maintenance Commands CRYPTSETUP-CONFIG(8)

cryptsetup-config - set permanent configuration options (store to LUKS header)

cryptsetup config

Set permanent configuration options (store to LUKS header). The config command is supported only for LUKS2.

The permanent options can be --priority to set priority (normal, prefer, ignore) for keyslot (specified by --key-slot) or --label and --subsystem.

can be [--priority, --label, --subsystem, --key-slot, --header, --disable-locks].

--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

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.

--key-slot, -S <0-N>

For LUKS operations that add key material, this option allows you to specify which keyslot is selected for the new key.

The maximum number of keyslots depends on the LUKS version. LUKS1 can have up to 8 keyslots. LUKS2 can have up to 32 keyslots based on keyslot area size and key size, but a valid keyslot ID can always be between 0 and 31 for LUKS2.

--label , --subsystem

Set label and subsystem description for LUKS2 device. These are similar to filesystem labels. The label and subsystem are optional fields and can be later used in udev scripts to trigger user actions once the device marked by these labels is detected.

--priority

Set a priority for LUKS2 keyslot. The prefer priority marked slots are tried before the normal priority. The ignored priority means that the slot is never used, if not explicitly requested by --key-slot option.

--usage

Show short option help.

--version, -V

Show the program version.

Report bugs at cryptsetup mailing list or in Issues project section https://gitlab.com/cryptsetup/cryptsetup/-/issues/new.

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

Cryptsetup FAQ https://gitlab.com/cryptsetup/cryptsetup/wikis/FrequentlyAskedQuestions

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

Part of cryptsetup project https://gitlab.com/cryptsetup/cryptsetup/.

2026-09-07 cryptsetup 2.8.8