Commands for Linux/GNU

sudo apt-get install "commands" //if command not found


$ cowsay "Random Text"
_____________
< Random Text >
 -------------
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
                ||----w |
                ||     ||

$ cowsay -l //list all available cowsay characters
C3PO  R2-D2  USA  ackbar  aperture-blank  aperture  armadillo  atat  atom  awesome-face  banana  bearface  beavis.zen  bees  bill-the-cat  biohazard  bishop  black-mesa  bong  box  broken-heart  bud-frogs  bunny  cake-with-candles  cake  cat  cat2  catfence  charizardvice  charlie  cheese  chessmen  chito  claw-arm  clippy  companion-cube  cower  cowfee  cthulhu-mini  cube  daemon  dalek-shooting  dalek  default  docker-whale  doge  dolphin  dragon-and-cow  dragon  ebi_furai  elephant-in-snake  elephant  elephant2  explosion  eyes  fat-banana  fat-cow  fence  fire  flaming-sheep  fox  ghost  ghostbusters  glados  goat  goat2  golden-eagle  hand  happy-whale  hedgehog  hellokitty  hippie  hiya  hiyoko  homer  hypno  ibm  iwashi  jellyfish  karl_marx  kilroy  king  kiss  kitten  kitty  knight  koala  kosh  lamb  lamb2  lightbulb  lobster  lollerskates  luke-koala  mailchimp  maze-runner  mech-and-cow  meow  milk  minotaur  mona-lisa  moofasa  mooghidjirah  moojira  moose  mule  mutilated  nyan  octopus  okazu  owl  pawn  periodic-table  personality-sphere  pinball-machine  psychiatrichelp  psychiatrichelp2  pterodactyl  queen  radio  ren  renge  robot  robotfindskitten  roflcopter  rook  sachiko  satanic  seahorse-big  seahorse  sheep  shikato  shrug  skeleton  small  smiling-octopus  snoopy  snoopyhouse  snoopysleep  spidercow  squid  squirrel  stegosaurus  stimpy  sudowoodo  supermilker  surgery  tableflip  taxi  telebears  template  threader  threecubes  toaster  tortoise  turkey  turtle  tux-big  tux  tweety-bird  vader-koala  vader  weeping-angel  whale  wizard  wood  world  www  yasuna_01  yasuna_02  yasuna_03  yasuna_03a  yasuna_04  yasuna_05  yasuna_06  yasuna_07  yasuna_08  yasuna_09  yasuna_10  yasuna_11  yasuna_12  yasuna_13  yasuna_14  yasuna_16  yasuna_17  yasuna_18  yasuna_19  yasuna_20  ymd_udon  zen-noh-milk

$ cowsay -f ghostbusters Who you Gonna Call 
 ____________________
< Who you Gonna Call >
 --------------------
          \
           \
            \          __---__
                    _-       /--______
               __--( /     \ )XXXXXXXXXXX\v.
             .-XXX(   o   o  )XXXXXXXXXXXXXXX-
            /XXX(       U     )        XXXXXXX\
          /XXXXX(              )--_  XXXXXXXXXXX\
         /XXXXX/ (      O     )   XXXXXX   \XXXXX\
         XXXXX/   /            XXXXXX   \__ \XXXXX
         XXXXXX__/          XXXXXX         \__---->
 ---___  XXX__/          XXXXXX      \__         /
   \-  --__/   ___/\  XXXXXX            /  ___--/=
    \-\    ___/    XXXXXX              '--- XXXXXX
       \-\/XXX\ XXXXXX                      /XXXXX
         \XXXXXXXXX   \                    /XXXXX/
          \XXXXXX      >                 _/XXXXX/
            \XXXXX--__/              __-- XXXX/
             -XXXXXXXX---------------  XXXXXX-
                \XXXXXXXXXXXXXXXXXXXXXXXXXX/
                  ""VXXXXXXXXXXXXXXXXXXV""

$ cowthink "Random Text"
( Random Text )
 -------------
        o   ^__^
         o  (oo)\_______
            (__)\       )\/\
                ||----w |
                ||     ||

$ sl or LS  //Steam Locomotive
(@@) (  ) (@)  ( )  @@    ()    @     O     @
                     (   )
                 (@@@@)
              (    )
            (@@@)
         ====        ________                ___________
     _D _|  |_______/        \__I_I_____===__|_________|
      |(_)---  |   H\________/ |   |        =|___ ___|      ________________
      /     |  |   H  |  |     |   |         ||_| |_||     _|
     |      |  |   H  |__--------------------| [___] |   =|
     | ________|___H__/__|_____/[][]~\_______|       |   -|
     |/ |   |-----------I_____I [][] []  D   |=======|____|_________________
   __/ =| o |=-O=====O=====O=====O \ ____Y___________|__|___________________
    |/-=|___|=    ||    ||    ||    |_____/~\___/          |_D__D__D_|  |_D_
     \_/      \__/  \__/  \__/  \__/      \_/               \_/   \_/    \_/

$ figlet Random Text //draw banners
 ____                 _                   _____         _   
|  _ \ __ _ _ __   __| | ___  _ __ ___   |_   _|____  _| |_ 
| |_) / _` | '_ \ / _` |/ _ \| '_ ` _ \    | |/ _ \ \/ / __|
|  _ < (_| | | | | (_| | (_) | | | | | |   | |  __/>  <| |_ 
|_| \_\__,_|_| |_|\__,_|\___/|_| |_| |_|   |_|\___/_/\_\\__|

$ toilet Random Text //draw banners again

 mmmmm                    #                      mmmmmmm                 m   
 #   "#  mmm   m mm    mmm#   mmm   mmmmm           #     mmm   m   m  mm#mm 
 #mmmm" "   #  #"  #  #" "#  #" "#  # # #           #    #"  #   #m#     #   
 #   "m m"""#  #   #  #   #  #   #  # # #           #    #""""   m#m     #   
 #    " "mm"#  #   #  "#m##  "#m#"  # # #           #    "#mm"  m" "m    "mm 

$ toilet -f mono12 -F metal Random Text //custom colored font & filter

▄▄           ██                                  
 ██           ▀▀                                  
 ██         ████     ██▄████▄  ██    ██  ▀██  ██▀ 
 ██           ██     ██▀   ██  ██    ██    ████   
 ██           ██     ██    ██  ██    ██    ▄██▄   
 ██▄▄▄▄▄▄  ▄▄▄██▄▄▄  ██    ██  ██▄▄▄███   ▄█▀▀█▄  
 ▀▀▀▀▀▀▀▀  ▀▀▀▀▀▀▀▀  ▀▀    ▀▀   ▀▀▀▀ ▀▀  ▀▀▀  ▀▀▀ 
                                                  

$ banner Wonderful //draws banners 

#     #
#  #  #   ####   #    #  #####   ######  #####   ######  #    #  #
#  #  #  #    #  ##   #  #    #  #       #    #  #       #    #  #
#  #  #  #    #  # #  #  #    #  #####   #    #  #####   #    #  #
#  #  #  #    #  #  # #  #    #  #       #####   #       #    #  #
#  #  #  #    #  #   ##  #    #  #       #   #   #       #    #  #
 ## ##    ####   #    #  #####   ######  #    #  #        ####   ######

$ fortune -s
Don't tell any big lies today.  Small ones can be just as effective.

$ fortune | cowsay
 ______________________________________
/ You like to form new friendships and \
\ make new acquaintances.              /
 --------------------------------------
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
                ||----w |
                ||     ||

$ cmatrix //The MATRIX

$ rev //Reverse text and files
hello
olleh
what ?
? tahw
this is super cool
looc repus si siht

$ apt-get moo //moo with apt-get 

         (__)
         (oo)
   /------\/
  / |    ||
 *  /\---/\
    ~~   ~~
...."Have you mooed today?"...

$ aptitude moo
There are no Easter Eggs in this program.
$ aptitude -v moo
There really are no Easter Eggs in this program.
$ aptitude -vv moo
Didn't I already tell you that there are no Easter Eggs in this program?
enlightened@enlightened:~$ aptitude -vvv moo
Stop it!
$ aptitude -vvvv moo
Okay, okay, if I give you an Easter Egg, will you go away?
$ aptitude -vvvvv moo
All right, you win.
                               /----\
                       -------/      \
                      /               \
                     /                |
   -----------------/                  --------\
   ----------------------------------------------
$ aptitude -vvvvvv moo
What is it?  It's an elephant being eaten by a snake, of course.

$ telnet towel.blinkenlights.nl //Watch whole movie of Star Wars 

$ yes start //loop commands
start
start
start
start
... keeps going on

$ factor 60 //factorise numbers
60: 2 2 3 5

$ pi 50 //The Constant
3.1415926535897932384626433832795028841971693993751

$ xcowsay "hello" // gui version of the cowsay command

$ xeyes //gui program that draws a pair of eyes on the desktop which follow the mouse cursor.

$ asciiviewer //convert images to ascii art
$ asciiview png path -driver curses

$ aafire //burn the console

$ bb //the successor of aa

$ espeak "Hello Linux, where are the penguins" //text to speech with espeak

$ rig //  command generates random and possibly fake identities.
Bettye Dunlap
799 Second St
Denver, CO  80202
(303) xxx-xxxx

$ screenfetch //display OS symbol and system informations

$ oneko //cat chasing your mouse cursor

$ while true; do echo "$(date '+%D %T' | toilet -f term -F border --gay)"; sleep 1; done //Display current date and time in a colourfulway