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

       Part of cryptsetupproject <https://gitlab.com/cryptsetup/cryptsetup/>.

cryptsetup 2.8.0                                   2025-07-25                          CRYPTSETUP-LUKSSUSPEND(8)

       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. Needs kernel 2.6.19 or later.

       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 have to use luksResume to reinstate the encryption key and unblock the device
       or close to remove the mapped device.

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

       WARNING: Never suspend the device on which the cryptsetup binary resides.

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

--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.

       --debugor--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 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<deviceorfilestoringtheLUKSheader>
           Use a detached (separated) metadata device or file where the LUKS header is stored. This option
           allows one to store 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.

       Report bugs at cryptsetupmailinglist <cryptsetup@lists.linux.dev> or in Issuesprojectsection
       <https://gitlab.com/cryptsetup/cryptsetup/-/issues/new>.

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

CryptsetupFAQ <https://gitlab.com/cryptsetup/cryptsetup/wikis/FrequentlyAskedQuestions>

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

cryptsetupluksSuspend[<options>]<name>