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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
E
ed
Text editor

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
      - echo
        Write arguments to standard output (POSIX)
      - ed
        Text editor
      - egrep
        Extended regular expression grep (UNIX)
      - elfnote
        Display or modify the contents of an ELF note (QNX)
      - elvis
        Visual interface editor clone (UNIX)
      - env
        Set the environment for command invocation (POSIX)
      - errno
        Explain errno numbers (QNX Neutrino)
      - esh
        Embedded shell (QNX Neutrino)
      - etfsctl
        Control an embedded transaction filesystem
      - expand
        Convert tabs to spaces (POSIX)
      - /etc/exports
        Define remote mountpoints for NFS mount requests
      - expr
        Evaluate arguments as an expression (POSIX)
    - F
    - G
    - H
    - I
    - J
    - K
    - L
    - 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.

ed

Text editor

Syntax:

ed [-] [-sx] [-p string] [file]

Runs on:

QNX Neutrino

Options:

-s: Suppress diagnostics. Use this option if the standard input to ed is from a script.
-x: Prompt for an encryption key that will be used for reads and writes.
-p string: Specify a command prompt.

Description:

The ed utility is a text editor. For more information, see ed.

Page updated: March 12, 2026