xeyes command not found

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

Introduction

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

xeyes: command not found

or when using sudo you get the following error message

sudo: xeyes: command not found

In Ubuntu xeyes is provided by x11-apps package.

x11-apps is:

This package provides a miscellaneous assortment of X applications that ship with the X Window System, including:

atobm, bitmap, and bmtoa, tools for manipulating bitmap images;
ico, a demo program animating polyhedrons;
oclock and xclock, graphical clocks;
rendercheck, a program to test render extension implementations;
transset, a tool to set opacity property on a window;
xbiff, a tool which tells you when you have new email;
xcalc, a scientific calculator desktop accessory;
xclipboard, a tool to manage cut-and-pasted text selections;
xconsole, which monitors system console messages;
xcursorgen, a tool for creating X cursor files from PNGs;
xditview, a viewer for ditroff output;
xedit, a simple text editor for X;
xeyes, a demo program in which a pair of eyes track the pointer;
xgc, a graphics demo;
xload, a monitor for the system load average;
xlogo, a demo program that displays the X logo;
xmag, which magnifies parts of the X screen;
xman, a manual page browser;
xmore, a text pager;
xwd, a utility for taking window dumps (“screenshots”) of the X session;
xwud, a viewer for window dumps created by xwd;
Xmark, x11perf, and x11perfcomp, tools for benchmarking graphical operations under the X Window System;

The xbiff, xcalc, xconsole, xedit and xman programs use bitmap images provided by the xbitmaps package.

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

sudo apt-get -y install x11-apps

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

You can also use apt command to install x11-apps.

sudo apt -y install x11-apps

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

sudo aptitude install x11-apps

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