CRYPTSETUP-LUKSSUSPEND(8)    Maintenance Commands    CRYPTSETUP-LUKSSUSPEND(8)

NAME
       cryptsetup-luksSuspend - suspends an active device and wipes the key

SYNOPSIS
       cryptsetup luksSuspend [<options>] <name>

DESCRIPTION
       Suspends an active device (all IO operations will block and accesses to
       the device will wait indefinitely) and wipes the encryption key from
       kernel memory.

       While the luksSuspend operation wipes encryption keys from memory, it
       does not remove possible plaintext data in various caches or in-kernel
       metadata for mounted filesystems.

       After this operation, you must use luksResume to reinstate the
       encryption key and unblock the device or close to remove the mapped
       device.

       WARNING: To avoid deadlock, never suspend the device on which the
       cryptsetup binary resides.

       <options> can be [--header, --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.

       --usage
	   Show short option help.

       --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/>.

cryptsetup 2.8.1		  2025-08-13	     CRYPTSETUP-LUKSSUSPEND(8)