zspann / find-missing-pet Goto Github PK

You just began your job as Web Developer at the Animal Sanctuary, and they aren't very good at organizing the photos of their favorite alumni animals. Somehow all photos ended up in the wrong folders! It's your job to move through their directory structure and put the animals in their right place. The photos have been named really well, so figuring out their correct location shouldn't be too tricky.

Because you're a legit programmer, you know the most efficient way is to navigate the directories in the command line. Use your bash command line skills to move the photos into their correct folders!

As a refresher, here's a list of commands to help you with this task:

pwd print working directory - shows you where you are

cd .. change your current directory to the parent (one above it)

ls list all files and directories

mv move a file. The mv command needs two extra pieces of information, the name of the file you're moving and where you want to move it. Let's say I want to move a file named me.txt back a level, I would enter mv me.txt ...

Remember, it's always helpful to know where you are in your directory tree in relation to where you want to go. Keep that in mind as you write out your command-line paths!

Let's first grab the files you'll need from Github.

• Easy: Click the "Clone or Download" button and then download this repo as a Zip file. Unzip it and move the unzipped folder to your development directory.

• Pro (Try this first): 'Fork' the repository and then clone it by clicking the "Clone or Download" button and then copying the SSH adress it gives you. In the terminal, navigate to your development directory and type git clone SSH-ADDRESS replacing SSH-ADDRESS with what you copied from github (it should look something like [email protected]:upperlinecode/find-missing-pet.git)

• Type ls to make sure that the folder was downloaded and then cd into that folder.

Use the commands we've learned to move the animals to their right places. If everything prints green, you've successfully organized all the Animal Sanctuary's adorable animal pics!

Notice that the painting-elephants.jpg image is located in find-missing-pet < cats < indoor < back-alley. But really, the painting elephant should go inside of find-missing-pet < elephants < painters.

We can move this elephant image by entering in terminal from the main directory of this project...

cd cats
cd indoor
cd back-alley
mv painting-elephants.jpg ..
cd ..
mv painting-elephants.jpg ..
cd ..
mv painting-elephants.jpg ..
cd ..
mv painting-elephants.jpg elephants
cd elephants
mv painting-elephants.jpg painters

BUT WOW that's a lot of steps. Programming is all about making things simple, so there has to be a better way. In fact, we can actually combine all the steps into one short line:

mv cats/indoor/back-alley/painting-elephants.jpg elephants/painters

For this, we're using relative paths. We're inside of the find-missing-pet directory and we're not going to use cd to move ourselves anywhere. Because painting-elephants.jpg doesn't exist inside the find-missing-pet directory, we have to tell the computer the path to go to find that image, which is through the cats directory, and then indoor and then finally back-alley.

Next, we have to tell the computer where to move the image. Because we're inside find-missing-pet and so is the elephants directory, we can just go straight there, and then into painters. Try moving some of the pets using this shortened technique!

Unfortunately the mv command actually has two uses: to move files, and to rename files. If you're trying to move a file and the place you are moving it to does not exist (maybe because your path isn't correct) what will happen is that you'll rename your file with the destination you were trying to provide. Using the example above I've removed the reference to the 'elephants' directory that the 'painters' directory:

mv cats/indoor/back-alley/painting-elephants.jpg painters

Since we can't access painters from where we currently are in the command line, the painting-elephants.jpg file will be renamed to painters. Oy. This can get confusing. If this happens, just use mv to rename the file back to its original name.

Do you feel comfortable moving files around? Have you moved the animals to their correct locations? The goal of this exercise is to get you comfortable navigating the command line and moving files around. If you feel good about this, move ahead!