Find and run the whalesay image

Find and run the whalesay p_w_picpath(尋找和運行whalesay鏡像)

People all over the world create Docker p_w_picpaths.（全世界的人們都可以創建docker p_w_picpaths） You can find these p_w_picpaths by browsing the Docker Hub.（你可以通過瀏覽Docker Hub來尋找這些鏡像） In this next section（在接下來的部分）, you’ll do just that to find the p_w_picpath to use in the rest of this getting started.（你僅僅需要做的是在接下來的開始找到這個鏡像去運用）

Step 1: Locate the whale(鯨)say p_w_picpath（定位whalesay鏡像）

1. Open your browser and browse to the Docker Hub.

   The Docker Hub contains p_w_picpaths from individual（個人，個體；個人的，個體的）s like you and official（官方的，正式的） p_w_picpaths from organizations like RedHat, IBM, Google, and a whole lot（大批的） more.

2. Click Browse & Search.

   The browser opens the search page.

3. Enter the word whalesay in the search bar（條，棒）.搜索框，搜索條

4. Click on the docker/whalesay p_w_picpath in the results.

   The browser displays the repository for the whalesay p_w_picpath.

   Each p_w_picpath repository contains information about an p_w_picpath. It should include information such as what kind of software the p_w_picpath contains and how to use it. You may notice that the whalesay p_w_picpath is based on a Linux distribution called Ubuntu. In the next step, you run the whalesay p_w_picpath on your machine.

Step 2: Run the whalesay p_w_picpath

1. Put your cursor（光標，遊標） in your terminal window at the $ prompt.

2. Type the docker run docker/whalesay cowsay boo command and press RETURN.

   This command runs the whalesay p_w_picpath in a container. Your terminal should look like the following:

   $ docker run docker/whalesay cowsay boo
   Unable to find p_w_picpath 'docker/whalesay:latest' locally
   latest: Pulling from docker/whalesay
   e9e06b06e14c: Pull complete
   a82efea989f9: Pull complete37bea4ee0c81: Pull complete07f8e8c5e660: Pull complete676c4a1897e6: Pull complete5b74edbcaa5b: Pull complete1722f41ddcb5: Pull complete99da72cfe067: Pull complete5d5bd9951e26: Pull complete
   fb434121fc77: Already exists
   Digest: sha256:d6ee73f978a366cf97974115abe9c4099ed59c6f75c23d03c64446bb9cd49163
   Status: Downloaded newer p_w_picpath for docker/whalesay:latest
    _____
   < boo >
    -----
       \
        \
         \                    ##        .## ## ##       ==## ## ## ##      ===
          /""""""""""""""""___/ ===
     ~~~ {~~ ~~~~ ~~~ ~~~~ ~~ ~ /  ===- ~~~
          \______ o          __/
           \    \        __/
             \____\______/

   The first time you run a software p_w_picpath, the docker command looks for it on your local system. If the p_w_picpath isn’t there, then docker gets it from the hub.

3. While still in the terminal, type docker p_w_picpaths command and press RETURN.

   The command lists all the p_w_picpaths on your local system. You should see docker/whalesay in the list.

   $ docker p_w_picpaths
   REPOSITORY           TAG         IMAGE ID            CREATED            VIRTUAL SIZE
   docker/whalesay      latest      fb434121fc77        3 hours ago        247 MB
   hello-world          latest      91c95931e552        5 weeks ago        910 B

   When you run an p_w_picpath in a container, Docker downloads the p_w_picpath to your computer. This local copy of the p_w_picpath saves you time. Docker only downloads the p_w_picpath again if the p_w_picpath’s source changes on the hub. You can, of course, delete the p_w_picpath yourself. You’ll learn more about that later. Let’s leave the p_w_picpath there for now because we are going to use it later.

4. Take a moment to play with the whalesay container a bit.（花一點時間去玩一下whalesay這個鏡像吧）

   Try running the whalesay p_w_picpath again with a word or phrase. Try a long or short phrase. Can you break the cow?

   $ docker run docker/whalesay cowsay boo-boo
    _________
   < boo-boo >
    ---------
       \
        \
         \     
                       ##        .            ## ## ##       ==            ## ## ## ##      ===            
          /""""""""""""""""___/ ===        
     ~~~ {~~ ~~~~ ~~~ ~~~~ ~~ ~ /  ===- ~~~   
          \______ o          __/            
           \    \        __/             
             \____\______/

Where to go next

On this page, you learned to search for p_w_picpaths on Docker Hub. You used your command line to run an p_w_picpath. You learned that running an p_w_picpath copies it on your computer. Now, you are ready to create your own Docker p_w_picpath. Go on to the next part to build your own p_w_picpath.

原文：https://docs.docker.com/linux/step_three/