This document provides instructions for hiding and finding an Easter egg image using terminal commands on Mac and Windows. It begins by explaining how to download the Easter egg image. It then provides an overview of what terminal is and why one would use it. It explains how to access the terminal interface on Mac and Windows. It outlines the basic terminal commands needed to navigate directories and find files - pwd, ls, and cd. It notes that terminal references the true file system structure rather than shortcuts. The final steps instruct how to use these commands to navigate to and find the hidden Easter egg image file. It concludes with some caution about being careful when using terminal.

1. Easter
Egg
Hunt
using terminal

2. Step 1 – Get Easter Egg
•Using any web browser (Internet Explorer,
Firefox, Safari, Chrome) go to Meetup.com
•Locate Reno Tahoe Women Who Code
MeetUp page
•Find photos on the menu
•Note the Easter Egg image

3. Step 2 – Hide Easter Egg
•Right click on the Easter Egg image
•Select Save Image As
•Enter easter_egg.jpg as file name
•Save in the location that comes up - DON’T
SELECT A DIFFERENT LOCATION

4. Before we start hunting for our
Easter Egg, let’s learn a little about
terminal

5. What is terminal?
It might be easier to define
what terminal isn’t.
It isn’t a graphical user interface (GUI). Most
computer users issue commands using icons,
menus and mice. This method uses a GUI.

6. Example of GUI
•Clicking an icon in your dock to run a program.
•Touching a tile in Metro view to run a program.
•Double clicking a folder to see what is inside.
•Double clicking a picture to view it.
•Double clicking a song to hear it.
•Using File menu to open a document.
•Dragging a file to the trash.

7. Okay, terminal is not a GUI. What is
it?
terminal is the way to issue instructions to a
computer by typing commands.

8. Why would I want to use terminal?
•It’s how programmers talk to their computers.
•It’s more efficient then using GUI.
•It’s more flexible and configurable.
•Most of the commands you’ll need to issue
don’t have a GUI equivalent.

9. The irony is that you’ll use a GUI
to get to terminal. Here’s how.
P.S. terminal is called Command Prompt on Windows.

10. Get to terminal on Mac
•Using Finder, locate your Application folder.
•Within the Application folder, locate Utilities.
•Within the Utilities folder, click on terminal.
This will add an icon in your Dock that looks like
a small black screen.
•Right click the terminal icon in the dock, select
Options, Keep in Dock.

11. Get to terminal on PC
Windows 7
•From Start Menu, All
Programs, locate Rails
Installer folder.
•Right click on Command
Prompt with Ruby and
Rails and add to Taskbar.
•Double click on icon to
launch.
Windows 8
•From Charms Bar, select
Search and search for
Command Prompt with
Ruby and Rails.
•Right click on same to
and to Taskbar.
•From Desktop, double
click icon to launch.

12. To find your Easter Egg, you
need three terminal
commands.

13. pwd
Where am I?

14. ls
What is here?

15. cd
Go ↑ (cd ..)
Go ↓ (cd folder )

16. Go ahead and practice those
three commands on your own
computers.

17. Just one more bit of information
before you start your Easter Egg hunt.
You need to understand your
computer’s file system.

18. terminal knows nothing about
shortcuts
Your computer creates shortcuts for
locations on your hard drive.
Some examples are Documents, Pictures,
Favorites and Desktop.
The real structure of your computer’s storage is
accessible by referencing Macintosh HD or Windows C:

19. Windows

20. Mac

21. Step 3 – Find easter_egg.jpg
•Navigate your hard drive using terminal
•Use pwd to find out where you are starting
•Use ls to see folders below you
•Use cd folder to move down
•Use cd .. to move up
•Hunt for your egg!

22. Some parting comments about
terminal.

23. Be Careful
•terminal is powerful
•There is no undo
•There are no ‘Are you sure?’ prompts
•A typo can have unexpected consequences

24. Next Steps
To learn more commands, check out
“The Command Line Crash Course” at
http://cli.learncodethehardway.org/book/