tss2_getrandom(1)

tss2_getrandom1

# synopsis tss2_getrandom [options]

Overview

tss2_getrandom(1) - This command uses the TPM to create an array of random bytes.

Options

These are the available options:

•
-n, --numBytes=INTEGER:

The number of bytes requested by the caller.

•

-f, --force:

Force overwriting the output file.

•

-o, --data=FILENAME or - (for stdout):

The returned random bytes.

•
--hex

Convert the output data to hex format without a leading “0x”.

Options

This collection of options are common to all tss2 programs and provide information that many users may expect.

•

-h, --help [man|no-man]: Display the tools manpage. By default, it attempts to invoke the manpager for the tool, however, on failure will output a short tool summary. This is the same behavior if the “man” option argument is specified, however if explicit “man” is requested, the tool will provide errors from man on stderr. If the “no-man” option if specified, or the manpager fails, the short options will be output to stdout.

To successfully use the manpages feature requires the manpages to be installed or on MANPATH, See man(1) for more details.

•

-v, --version: Display version information for this tool, supported tctis and exit.

Examples

    tss2_getrandom --numBytes=20 --data=- | hexdump -C

Returns

0 on success or 1 on failure.

Help

See the Mailing List ⟨https://lists.linuxfoundation.org/mailman/listinfo/tpm2⟩\c

Releases

3 releases since Debian 12 (Bookworm); the text changed 2 times.

  1. 12
  2. 13
  3. Arch

Bugs

Github Issues ⟨https://github.com/tpm2-software/tpm2-tools/issues⟩\c

License

This work is licensed under the Creative Commons Attribution 4.0 International License (CC BY 4.0) ⟨https://creativecommons.org/licenses/by/4.0/⟩\c .

From tpm2-tools 5.8-1 in Arch Linux 2026-11-01. Parsed by carta from the page's man source.