10 Hilarious Linux Commands That Turn Your Terminal Into a Playground

cmatrix

This program mimics the falling green code seen in "The Matrix" movies, creating a hacker‑style data stream on your terminal.

Installation sudo apt-get install cmatrix Run cmatrix The command launches a full‑screen cascade of characters.

oneko

Oneko displays a small animated cat that follows your mouse pointer, adding a playful element to the console.

Installation sudo apt-get install oneko Run oneko The cat chases the cursor across the screen.

aafire

aafire renders a flickering ASCII fire effect directly in the terminal.

Installation sudo apt-get install libaa-bin Run aafire The terminal window fills with animated flames.

ASCIIquarium

ASCIIquarium turns your terminal into a miniature aquarium with fish, bubbles, and sea creatures.

Installation

cd /tmp

wget http://www.robobunny.com/projects/asciiquarium/asciiquarium.tar.gz

tar -zxvf asciiquarium.tar.gz

cd asciiquarium_1.1/

cp asciiquarium /usr/local/bin

chmod 0755 /usr/local/bin/asciiquarium

Run asciiquarium The terminal displays a moving aquarium scene.

toilet

Toilet prints large, stylized text in various fonts and colors, similar to the classic figlet utility.

Installation sudo apt-get install toilet Run examples

toilet www.aqee.net

toilet -f mono12 -F metal www.aqee.net

These commands output the supplied text in decorative ASCII art.

sl (Steam Locomotive)

When you mistype ls as sl, a small steam locomotive animation runs across the screen.

Installation sudo apt-get install sl Run sl The animation mimics a train steaming through your terminal.

Cowsay (and xcowsay)

Cowsay makes a cow (or other animal) say a supplied message in a speech bubble; xcowsay provides a graphical version.

Installation

sudo apt-get install cowsay

sudo apt-get install xcowsay

Run

cowsay 你好，外刊IT评论网

xcowsay 你好，外刊IT评论网

The cow (or graphical window) displays the text.

xeyes

xeyes opens a pair of animated eyes that follow the mouse pointer.

Installation sudo apt-get install xeyes Run xeyes The eyes track cursor movement on the screen.

moo

The moo command is an Easter egg that prints a whimsical ASCII cow saying “Moo!”. No installation is required.

Run

apt-get moo

bb

The bb command displays a short animation of a bouncing ball in the terminal.

Installation sudo apt-get install bb Run

bb