Linux cli command vbutil_kernel

➡ A Linux man page (short for manual page) is a form of software documentation found on Linux and Unix-like operating systems. This man-page explains the command vbutil_kernel and provides detailed information about the command vbutil_kernel, system calls, library functions, and other aspects of the system, including usage, options, and examples of _. You can access this man page by typing man followed by the vbutil_kernel.

  3 minute read  

NAME 🖥️ vbutil_kernel 🖥️

Utility to sign custom kernels to boot with Chrome OS devices

SYNOPSIS

futility /usr/bin/vbutil_kernel –pack <file> [PARAMETERS]

DESCRIPTION

Required parameters:

–keyblock <file>
Key block in .keyblock format

–signprivate <file>
Private key to sign kernel data, in .vbprivk format

–version <number>
Kernel version

–vmlinuz <file>
Linux kernel bzImage file

–bootloader <file>
Bootloader stub

–config <file>
Command line file

–arch <arch>
Cpu architecture (default x86)

Optional:

–kloadaddr <address>
Assign kernel body load address

–pad <number>
Verification padding size in bytes

–vblockonly
Emit just the verification blob

–flags NUM
Flags to be passed in the header

OR

Usage: futility /usr/bin/vbutil_kernel –repack <file> [PARAMETERS]

Required parameters:

–signprivate <file>
Private key to sign kernel data, in .vbprivk format

–oldblob <file>
Previously packed kernel blob (including verification blob)

Optional:

–keyblock <file>
Key block in .keyblock format

–config <file>
New command line file

–version <number>
Kernel version

–kloadaddr <address>
Assign kernel body load address

–pad <number>
Verification blob size in bytes

–vblockonly
Emit just the verification blob

OR

Usage: futility /usr/bin/vbutil_kernel –verify <file> [PARAMETERS]

Optional:

–signpubkey <file>
Public key to verify kernel keyblock, in .vbpubk format

–verbose
Print a more detailed report

–keyblock <file>
Outputs the verified key block, in .keyblock format

–pad <number>
Verification padding size in bytes

–minversion <number>
Minimum combined kernel key version

OR

Usage: futility /usr/bin/vbutil_kernel –get-vmlinuz <file> [PARAMETERS]

Required parameters:

–vmlinuz-out <file>
vmlinuz image output file

Usage: futility /usr/bin/vbutil_kernel –pack <file> [PARAMETERS]

Required parameters:

–keyblock <file>
Key block in .keyblock format

–signprivate <file>
Private key to sign kernel data, in .vbprivk format

–version <number>
Kernel version

–vmlinuz <file>
Linux kernel bzImage file

–bootloader <file>
Bootloader stub

–config <file>
Command line file

–arch <arch>
Cpu architecture (default x86)

Optional:

–kloadaddr <address>
Assign kernel body load address

–pad <number>
Verification padding size in bytes

–vblockonly
Emit just the verification blob

–flags NUM
Flags to be passed in the header

OR

Usage: futility /usr/bin/vbutil_kernel –repack <file> [PARAMETERS]

Required parameters:

–signprivate <file>
Private key to sign kernel data, in .vbprivk format

–oldblob <file>
Previously packed kernel blob (including verification blob)

Optional:

–keyblock <file>
Key block in .keyblock format

–config <file>
New command line file

–version <number>
Kernel version

–kloadaddr <address>
Assign kernel body load address

–pad <number>
Verification blob size in bytes

–vblockonly
Emit just the verification blob

OR

Usage: futility /usr/bin/vbutil_kernel –verify <file> [PARAMETERS]

Optional:

–signpubkey <file>
Public key to verify kernel keyblock, in .vbpubk format

–verbose
Print a more detailed report

–keyblock <file>
Outputs the verified key block, in .keyblock format

–pad <number>
Verification padding size in bytes

–minversion <number>
Minimum combined kernel key version

OR

Usage: futility /usr/bin/vbutil_kernel –get-vmlinuz <file> [PARAMETERS]

Required parameters:

–vmlinuz-out <file>
vmlinuz image output file

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