xbacklight command not found

In this troubleshooting guide we learn how to fix xbacklight command not found error message

Introduction

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

xbacklight: command not found

or when using sudo you get the following error message

sudo: xbacklight: command not found

In Ubuntu xbacklight is provided by xbacklight package.

xbacklight is:

xbacklight is a simple command-line utility to set the backlight level using the RandR 1.2 Backlight output property.

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

sudo apt-get -y install xbacklight

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

You can also use apt command to install xbacklight.

sudo apt -y install xbacklight

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

sudo aptitude install xbacklight

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