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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
L
link
Create a link to a file (POSIX)

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
      - ld
        Linker command (POSIX)
      - ldd
        List the shared objects that a program requires (Unix)
      - less
        Display files on a page-by-page basis (UNIX)
      - libcam.so
        Common access methods support
      - link
        Create a link to a file (POSIX)
      - ln
        Create links to (aliases for) files (POSIX)
      - ln-w
        Create a link on Windows
      - location_manager
        Make location information available to client applications
      - logger
        Make entries in the system log (POSIX)
      - login
        Log in
      - logout
        Terminate a session (UNIX)
      - ls
        List directory contents (POSIX)
      - lsm-llmcast.so
        Low-latency multicast module
      - lsm-pf-v4.so, lsm-pf-v6.so
        IP filter services
      - lsm-qnet.so
        Transparent Distributed Processing (native QNX Neutrino network) module
      - lwresd
        Lightweight resolver daemon
      - lzcat, lzma
        Compress or decompress .lzma files
      - lzmadec
        Small .lzma decompressor
      - lzmainfo
        Show information stored in the .lzma file header
    - M
    - N
    - O
    - P
    - Q
    - R
    - S
    - T
    - U
    - 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.

link

Create a link to a file (POSIX)

Syntax:

link existing new

Runs on:

QNX Neutrino

Options:

existing: Pathname of an existing file.
new: Pathname of the link to be created.

Description:

The link utility creates a hard link, new, that points to another file, existing. To create a symbolic link, use ln.

Note:

QNX Neutrino also supports a toybox version of this utility. For more information, go to the toybox entry of this reference.

Exit status:

0: Successful completion.
> 0: An error occurred.

Page updated: March 12, 2026