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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | REPORTING BUGS | SEE ALSO | CRYPTSETUP |
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CRYPTSETUP-LUKSRESUME(8) Maintenance Commands CRYPTSETUP-LUKSRESUME(8)
cryptsetup-luksResume - resume a suspended device and reinstate
the key
cryptsetup luksResume [<options>] <name>
Resumes a suspended device and reinstates the encryption key.
Prompts interactively for a passphrase if no token is usable
(LUKS2 only) or --key-file is not given.
<options> can be [--key-file, --keyfile-size, --keyfile-offset,
--key-slot, --header, --disable-keyring, --disable-locks,
--token-id, --token-only, --token-type,
--disable-external-tokens, --type, --tries, --timeout,
--verify-passphrase, --volume-key-keyring, --link-vk-to-keyring,
--external-tokens-path].
--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-external-tokens
Disable loading of plugins for external LUKS2 tokens.
--disable-keyring
Do not load volume key in kernel keyring and store it
directly in the dm-crypt target instead. This option is
supported only for the LUKS2 type.
--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).
--external-tokens-path absolute_path
Override system directory path where cryptsetup searches for
external token handlers (or token plugins). It must be
absolute path (starting with '/' character).
--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.
--help, -?
Show help text and default parameters.
--key-description <text>
Set key description in keyring that will be used for
passphrase retrieval.
--key-file, -d name
Read the passphrase from file.
If the name given is "-", then the passphrase will be read
from stdin. In this case, reading will not stop at newline
characters.
See section NOTES ON PASSPHRASE PROCESSING in cryptsetup(8)
for more information.
--keyfile-offset value
Skip value bytes at the beginning of the key file.
--keyfile-size, -l value
Read a maximum of value bytes from the key file. The default
is to read the whole file up to the compiled-in maximum that
can be queried with --help. Supplying more data than the
compiled-in maximum aborts the operation.
This option is useful to cut trailing newlines, for example.
If --keyfile-offset is also given, the size count starts
after the offset.
--key-slot, -S <0-N>
For LUKS operations that add key material, this option allows
you to specify which key slot is selected for the new key.
The maximum number of key slots depends on the LUKS version.
LUKS1 can have up to 8 key slots. LUKS2 can have up to 32 key
slots based on key slot area size and key size, but a valid
key slot ID can always be between 0 and 31 for LUKS2.
--link-vk-to-keyring <keyring_description>::<key_description>
Link volume key in a keyring with specified key name. The
volume key is linked only if requested action is successfully
finished (with --test-passphrase the verified volume key is
linked in a keyring without taking further action).
<keyring_description> string has to contain existing kernel
keyring description. The keyring name may be optionally
prefixed with "%:" or "%keyring:" type descriptions. Or, the
keyring may also be specified directly by numeric key id.
Also special keyring notations starting with "@" may be used
to select existing predefined kernel keyrings.
The string "::" is delimiter used to separate keyring
description and key description.
<key_description> part describes key type and key name of
volume key linked in the keyring described in
<keyring_description>. The type may be specified by adding
"%<type_name>:" prefix in front of key name. If type is
missing default user type is applied. If the key of same name
and same type already exists (already linked in the keyring)
it will get replaced in the process.
See also KEY IDENTIFIERS section of keyctl(1).
--timeout, -t <number of seconds>
The number of seconds to wait before timeout on passphrase
input via terminal. It is relevant every time a passphrase is
asked. It has no effect if used in conjunction with
--key-file.
This option is useful when the system should not stall if the
user does not input a passphrase, e.g. during boot. The
default is a value of 0 seconds, which means to wait forever.
--token-id
Specify what token to use and allow token PIN prompt to take
precedence over interactive keyslot passphrase prompt. If
omitted, all available tokens (not protected by PIN) will be
checked before proceeding further with passphrase prompt.
--token-only
Do not proceed further with action if token based keyslot
unlock failed. Without the option, action asks for passphrase
to proceed further.
It allows LUKS2 tokens protected by PIN to take precedence
over interactive keyslot passphrase prompt.
--token-type type
Restrict tokens eligible for operation to specific token
type. Mostly useful when no --token-id is specified.
It allows LUKS2 type tokens protected by PIN to take
precedence over interactive keyslot passphrase prompt.
--tries, -T
How often the input of the passphrase shall be retried. The
default is 3 tries.
--type <device-type>
Specifies required device type, for more info read BASIC
ACTIONS section in cryptsetup(8).
--usage
Show short option help.
--verify-passphrase, -y
When interactively asking for a passphrase, ask for it twice
and complain if both inputs do not match. Ignored on input
from file or stdin.
--version, -V
Show the program version.
--volume-key-keyring <key description>
Use a volume key stored in a keyring. This allows one to open
luks and device types without giving a passphrase. The key
and associated type has to be readable from userspace so that
volume key digest may be verified in before activation.
The <key description> uses keyctl-compatible syntax. This can
either be a numeric key ID or a string name in the format
%<key type>:<key name>. See also KEY IDENTIFIERS section of
keyctl(1). When no %<key type>: prefix is specified we assume
the key type is user (default type).
Report bugs at cryptsetup mailing list
<[email protected]> 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 [email protected]. 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
[email protected]
cryptsetup 2.8.0-git 2023-12-22 CRYPTSETUP-LUKSRESUME(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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