gtk3-demo command not found

Introduction

When you run more command in linux terminal / console, you get the following error message

gtk3-demo: command not found

or when using sudo you get the following error message

sudo: gtk3-demo: command not found

Solutions to gtk3-demo: command not found

How To Fix gtk3-demo: command not found in Ubuntu / Debian / Kali Linux / Raspbian

In Ubuntu gtk3-demo is provided by gtk-3-examples package.

gtk-3-examples is:

GTK is a multi-platform toolkit for creating graphical user interfaces. Offering a complete set of widgets, GTK is suitable for projects ranging from small one-off tools to complete application suites.

This package contains the example files and a demonstration program for GTK3. It also contains the installed tests.

To fix this problem, we can install more using the command below.

sudo apt-get -y install gtk-3-examples

This command might take some time to finish depending on your machine internet connection.

You can also use apt command to install gtk-3-examples.

sudo apt -y install gtk-3-examples

Or if you have aptitude installed you can use the following command.

sudo aptitude install gtk-3-examples

Summary

In this tutorial we learn how to fix gtk3-demo command not found error in Ubuntu / Debian / Kali Linux or Raspbian distribution.