# NDCTL User Guide ## Introduction `ndctl` is a utility for managing the Linux LIBNVDIMM Kernel subsystem. It is designed to work with various non-volatile memory devices (NVDIMMs) from different vendors. The LIBNVDIMM subsystem defines a kernel device model and control message interface for platform NVDIMM resources like those defined by the [ACPI v6.0](http://www.uefi.org/sites/default/files/resources/ACPI_6_0_Errata_A.PDF) NFIT (**N**VDIMM **F**irmware **I**nterface **T**able). The latest [ACPI ](http://www.uefi.org/specifications)and [UEFI ](http://www.uefi.org/specifications)specifications can be found at [uefi.org](http://www.uefi.org). Operations supported by `ndctl` include: * Provisioning capacity (namespaces) * Enumerating Devices * Enabling and Disabling NVDIMMs, Regions, and Namespaces * Managing NVDIMM Labels ## What's new in v72.1 This release incorporates functionality up to the 5.16 kernel. Highlights include a new utility and library for interfacing with the 'CXL' drivers and devices, a policy based configuration mechanism for ndctl and daxctl, fixes, test updates, and general additions for the PAPR family of NVDIMMs, more seed device accounting fixes, misc unit test and documentation updates, and fixes to NVDIMM bus scrubbing. Bug Fixes: * Fix iniparser.h include * test/monitor: fix conf\_file in test\_conf\_file --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.pmem.io/ndctl-user-guide/v72.1/master.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.