---
name: "tpm_setclearable"
section: "8"
platform: "linux"
package: "tpm-tools"
version: "1.3.9.2-0.2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/tpm_setclearable"
---

# tpm\_setclearable(8)

disable TPM clear operations

TPM Management - tpm\_setclearable

## NAME

tpm\_setclearable - disable TPM clear operations

## SYNOPSIS

**tpm\_setclearable** \[**OPTION**\]

## DESCRIPTION

**tpm\_setclearable** reports the status of the TPM's flags regarding how the TPM can be cleared.  This is the default behavior and also accessible via the **--status** option. Requesting a report of this status prompts for the owner password.  The **--owner** option requests that the TPM disable clear operations   (via the TPM\_DisableOwnerClear API) disabling the owner from clearing out the ownership information.  This operation prompts for the owner password.  This operation is in effect until the current owner is cleared.  The **--force**  option (via the TPM\_DisableForceClear API) disables using Phyiscal Presence to authorize a clear operation.  This operation does not require authorization and will skip the owner password prompt.  This operation is only in effect until a reboot.

- **-h**, **--help**

  Display command usage info.

- **-v**, **--version**

  Display command version info.

- **-l**, **--log** \[none\|error\|info\|debug\]

  Set logging level.

- **-u**, **--unicode**

  Use TSS UNICODE encoding for passwords to comply with applications using TSS popup boxes

- **-s**, **--status**

  Report the status of flags regarding how the TPM can be cleared.

- **-o**, **--owner**

  Disable use of owner authorization for authorizating a clear operation until a new owner exists.

- **-f**, **--force**

  Disable use of Physical Presence for authorizating a clear operation until a reboot has occurred.

- **-z**, **--well-known**

  Authenticate using 20 bytes of zeros as owner password (the default TSS Well Known Secret), instead of prompting for an owner password.

## SEE ALSO

[**tpm\_version**(1)](/tpm_version/1.md), [**tpm\_takeownership**(8)](/tpm_takeownership/8.md), [**tpm\_clear**(8)](/tpm_clear/8.md), [**tcsd**(8)](/tcsd/8.md)

## REPORTING BUGS

Report bugs to \<trousers-users@lists.sourceforge.net\>