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% tpm2_nvsetbits(1) tpm2-tools | General Commands Manual
# NAME
**tpm2_nvsetbits**(1) - Bitwise OR bits into a Non-Volatile (NV).
# SYNOPSIS
**tpm2_nvsetbits** [*OPTIONS*] [*ARGUMENT*]
# DESCRIPTION
**tpm2_nvsetbits**(1) - Bitwise OR bits into a Non-Volatile (NV). The
NV index must be of type "bits" which is specified via the "nt" field
when creating the NV space with tpm2_nvdefine(1). The index can be
specified as raw handle or an offset value to the NV handle range
"TPM2_HR_NV_INDEX".
# OPTIONS
* **-C**, **\--hierarchy**=_OBJECT_:
Specifies the hierarchy used to authorize.
Supported options are:
* **o** for **TPM_RH_OWNER**
* **p** for **TPM_RH_PLATFORM**
* **`<num>`** where a hierarchy handle or nv-index may be used.
When **-C** isn't explicitly passed the index handle will be used to
authorize against the index. The index auth value is set via the
**-p** option to **tpm2_nvdefine**(1).
* **-P**, **\--auth**=_AUTH_:
Specifies the authorization value for the hierarchy.
* **-i**, **\--bits**=_BITS_:
Specifies the bit value as a number to bitwise OR into the current value
of the NV index.
* **\--cphash**=_FILE_
File path to record the hash of the command parameters. This is commonly
termed as cpHash. NOTE: When this option is selected, The tool will not
actually execute the command, it simply returns a cpHash.
* **ARGUMENT** the command line argument specifies the NV index or offset
number.
## References
[context object format](common/ctxobj.md) details the methods for specifying
_OBJECT_.
[authorization formatting](common/authorizations.md) details the methods for
specifying _AUTH_.
[common options](common/options.md) collection of common options that provide
information many users may expect.
[common tcti options](common/tcti.md) collection of options used to configure
the various known TCTI modules.
# EXAMPLES
## OR 0xbadc0de into an index of 0's
```bash
tpm2_nvdefine -C o -a "nt=bits|ownerread|policywrite|ownerwrite|writedefine" 1
tpm2_nvsetbits -C o -i 0xbadc0de 1
tpm2_nvread -C o 1 | xxd -p | sed s/'^0*'/0x/
0xbadc0de
```
[returns](common/returns.md)
[footer](common/footer.md)
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