---
name: "hdfunpac"
section: "1"
platform: "linux"
package: "hdf4-tools"
version: "4.3.0-1+b1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/hdfunpac"
---

# hdfunpac(1)

unpacks an HDF file

## NAME

hdfunpac - unpacks an HDF file

## SYNOPSIS

**hdfunpac** \[**-d** \<datafilename\>\] *\<hdffile\>*

## DESCRIPTION

**hdfunpac** unpacks an HDF file by exporting the scientific data elements (DFTAG\_SD) to external object elements.  This is a utility for external file handling for the parallel I/O interface on the CM5.