SYSTEMD-TPM2-CLEAR.SERVICE(8)                       systemd-tpm2-clear.service

NAME
       systemd-tpm2-clear.service - Request that the TPM security chip is
       cleared on next boot

SYNOPSIS
       systemd-tpm2-clear.service

       /usr/lib/systemd/systemd-tpm2-clear

DESCRIPTION
       systemd-tpm2-clear.service is a service that requests that the TPM is
       reset by the PC firmware on the next boot. It makes use of the TPM
       Physical Presence Interface (PPI). Note that this service does not
       immediately execute the clear operation, but simply asks the PC
       firmware to execute it at next boot, where the user will be asked for
       confirmation before the operation is done.

       systemd-tpm2-clear.service is typically hooked into the
       factory-reset.target unit in order to request the TPM request before an
       immediate reboot. See Factory Reset[1] for more information.

OPTIONS
       The following options are understood:

       --graceful
           Exit cleanly and execute no operation if the system does not
           possess a TPM chip.

           Added in version 258.

       -h, --help
           Print a short help text and exit.

       --version
           Print a short version string and exit.

KERNEL COMMAND LINE
       systemd-tpm2-clear understands the following kernel command line
       parameters:

       systemd.tpm2_allow_clear=
           Takes a boolean argument. If false the service will succeed, but
           instead of requesting the TPM clear operation from the PC firmware
           it will not execute any operation. If not specified defaults to
           true.

           Added in version 258.

SEE ALSO
       systemd(1), systemd-tpm2-setup.service(8), systemd-factory-reset-
       request.service(8)

NOTES
        1. Factory Reset
           https://systemd.io/FACTORY_RESET

systemd 258                                      SYSTEMD-TPM2-CLEAR.SERVICE(8)