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QNX Software Development Platform
QNX SDP is a cross-compiling and debugging environment, including an IDE and command-line tools, for building binary images and programs for target boards running QNX Neutrino 7.1.
Utilities & Libraries
Utilities Reference
U
unxz, unlzma
Decompress .xz and .lzma files

QNX Momentics IDE User's Guide
This User's Guide describes version 7.1 of the Integrated Development Environment (IDE) that's part of the QNX Momentics tool suite.
QNX Software Development Platform
QNX SDP is a cross-compiling and debugging environment, including an IDE and command-line tools, for building binary images and programs for target boards running QNX Neutrino 7.1.
- Quickstart Guide
- OS Components & Operations
- Audio & Graphics API
- Multimedia
- Networking Middleware
- Programming
- Sensor Framework
- System Security Guide
  The QNX System Security Guide is intended for both system integrators who are responsible for the security of a QNX Neutrino RTOS system and developers who want to create a QNX Neutrino resource manager free from vulnerabilities.
- Utilities & Libraries
  - Addon Interfaces Library Reference
  - C Library Reference
  - Devctl and Ioctl Commands
  - JSON Library Reference
  - PAM Reference
  - Utilities Reference
    - Utility Conventions
    - A
    - B
    - C
    - D
    - E
    - F
    - G
    - H
    - I
    - J
    - K
    - L
    - M
    - N
    - O
    - P
    - Q
    - R
    - S
    - T
    - U
      - ubus_ctrl
        USB Bus State Enable/Disable utility
      - uesh
        Micro-embedded shell (QNX Neutrino)
      - ulink_ctrl
        Control a USB DCD link
      - umask
        Get or set the file mode creation mask (POSIX)
      - umount
        Unmount a device
      - uname
        Return the name of the operating system (POSIX)
      - unexpand
        Convert spaces to tabs (POSIX)
      - unifdef
        Remove ifdef'ed C/C++ lines
      - uniq
        Report or filter out repeated lines in a file (POSIX)
      - unlink
        Call the unlink() function to delete a file
      - unxz, unlzma
        Decompress .xz and .lzma files
      - unzip
        Extract files from a zip archive
      - uptime
        Display the length of time that the system has been running
      - usb
        Display USB device configuration
      - use
        Print a usage message (QNX Neutrino)
      - usemsg
        Change the usage message for a command (QNX Neutrino)
      - uud
        Decode a file that was encoded with uue
      - uudecode
        Decode a file that was encoded with uuencode (POSIX)
      - uue
        Encode a binary file into ASCII
      - uuencode
        Encode a binary file or standard input into ASCII (POSIX)
    - V
    - W
    - X
    - Y
    - Z
    - Commonly Used Environment Variables
    - Selecting the Target System
    - Glossary
  - WPA Control Interface Reference
    This document provides a reference for the Wi-Fi Protected Access (WPA) control interface, which provides a C API for the WPA/IEEE 802.11i protocols in Wi-Fi client stations. Application developers who want to control WPA operations and get associated status and event data should read this reference.
QNX Hypervisor
The QNX Hypervisor allows you to run multiple OSs on a target system so you can separate critical and non-critical functions, support a wide variety of applications, and reduce hardware costs.
QNX Software in the Cloud
QNX Software in the Cloud enables developers to use the QNX software in Amazon Web Services (AWS) and Microsoft Azure (Azure).
QNX Advanced Virtualization Frameworks User's Guide
This User's Guide is aimed at all systems integrators and developers who want to design and build embedded systems using the QNX Advanced Virtualization Frameworks.
Typographical Conventions, Support, and Licensing
This section describes the typographical conventions used throughout the documentation and explains how to obtain technical support.

unxz, unlzma

Decompress .xz and .lzma files

Syntax:

unxz [option]... [file]...
unlzma [option]... [file]...

See xz.

Page updated: March 12, 2026