Manual: systemd-tpm2-clear.service

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

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 259.5										       SYSTEMD-TPM2-CLEAR.SERVICE(8)