---
name: "futility"
section: "1"
platform: "linux"
package: "vboot-kernel-utils"
version: "0~R106-15054.B+dfsg-0.1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/futility"
---

# futility(1)

Unified firmware utility

## NAME

futility - Unified firmware utility

## SYNOPSIS

**futility** \[*options*\] *COMMAND* \[*args*...\]

## DESCRIPTION

futility is the unified firmware utility, which will eventually replace most of the distinct verified boot tools formerly produced by the vboot\_reference package.

When symlinked under the name of one of those previous tools, it should fully implement the original behavior. It can also be invoked directly as futility, followed by the original name as the first argument.

Global options:

- **--vb1**

  Use only vboot v1.0 binary formats

- **--vb21**

  Use only vboot v2.1 binary formats

- **--debug**

  Be noisy about what's going on

The following commands are built-in:

- create

  Create a keypair from an RSA .pem file

- dump\_fmap

  Display FMAP contents from a firmware image

- dump\_kernel\_config

  Prints the kernel command line

- gbb\_utility

  Manipulate the Google Binary Block (GBB)

- help

  Show a bit of help (you're looking at it)

- load\_fmap

  Replace the contents of specified FMAP areas

- pcr

  Simulate a TPM PCR extension operation

- show

  Display the content of various binary components

- sign

  Sign / resign various binary components

- vbutil\_firmware

  Verified boot firmware utility

- vbutil\_kernel

  Creates, signs, and verifies the kernel partition

- vbutil\_key

  Wraps RSA keys with vboot headers

- vbutil\_keyblock

  Creates, signs, and verifies a keyblock

- verify

  Verify the signatures of various binary components

- version

  Show the futility source revision and build date

Use "futility help COMMAND" for more information.

Usage: futility \[options\] COMMAND \[args...\]

This is the unified firmware utility, which will eventually replace most of the distinct verified boot tools formerly produced by the vboot\_reference package.

When symlinked under the name of one of those previous tools, it should fully implement the original behavior. It can also be invoked directly as futility, followed by the original name as the first argument.

Global options:

- **--vb1**

  Use only vboot v1.0 binary formats

- **--vb21**

  Use only vboot v2.1 binary formats

- **--debug**

  Be noisy about what's going on

The following commands are built-in:

- create

  Create a keypair from an RSA .pem file

- dump\_fmap

  Display FMAP contents from a firmware image

- dump\_kernel\_config

  Prints the kernel command line

- gbb\_utility

  Manipulate the Google Binary Block (GBB)

- help

  Show a bit of help (you're looking at it)

- load\_fmap

  Replace the contents of specified FMAP areas

- pcr

  Simulate a TPM PCR extension operation

- show

  Display the content of various binary components

- sign

  Sign / resign various binary components

- vbutil\_firmware

  Verified boot firmware utility

- vbutil\_kernel

  Creates, signs, and verifies the kernel partition

- vbutil\_key

  Wraps RSA keys with vboot headers

- vbutil\_keyblock

  Creates, signs, and verifies a keyblock

- verify

  Verify the signatures of various binary components

- version

  Show the futility source revision and build date

Use "futility help COMMAND" for more information.

## SEE ALSO

The full documentation for **futility** is maintained as a Texinfo manual.  If the **info** and **futility** programs are properly installed at your site, the command

-

  **info futility**

should give you access to the complete manual.