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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | REPORTING BUGS | SEE ALSO | CRYPTSETUP |
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CRYPTSETU...ADERBACKUP(8) Maintenance Commands CRYPTSETU...ADERBACKUP(8)
cryptsetup-luksHeaderBackup - store a binary backup of the LUKS
header and keyslot area
cryptsetup luksHeaderBackup --header-backup-file <file>
[<options>] <device>
Stores a binary backup of the LUKS header and keyslot area.
NOTE: Using '-' as filename writes the header backup to a file
named '-'.
<options> can be [--header, --header-backup-file,
--disable-locks].
WARNING: This backup file and a passphrase valid at the time of
backup allows decryption of the LUKS data area, even if the
passphrase was later changed or removed from the LUKS device.
Also note that with a header backup you lose the ability to
securely wipe the LUKS device by just overwriting the header and
key-slots. You either need to securely erase all header backups
in addition or overwrite the encrypted data area as well. The
second option is less secure, as some sectors can survive, e.g.,
due to defect management.
--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 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
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.
--header-backup-file <file>
Specify file with header backup file.
--help, -?
Show help text and default parameters.
--usage
Show short option help.
--version, -V
Show the program version.
Report bugs at cryptsetup mailing list
<cryptsetup@lists.linux.dev> or in Issues project section
<https://gitlab.com/cryptsetup/cryptsetup/-/issues/new>.
Please attach 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/>. This page is part of
the Cryptsetup ((open-source disk encryption)) project.
Information about the project can be found at
⟨https://gitlab.com/cryptsetup/cryptsetup⟩. If you have a bug
report for this manual page, send it to dm-crypt@saout.de. This
page was obtained from the project's upstream Git repository
⟨https://gitlab.com/cryptsetup/cryptsetup.git⟩ on 2024-06-14. (At
that time, the date of the most recent commit that was found in
the repository was 2024-06-11.) If you discover any rendering
problems in this HTML version of the page, or you believe there
is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
cryptsetup 2.8.0-git 2023-09-13 CRYPTSETU...ADERBACKUP(8)
Pages that refer to this page: cryptsetup(8)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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