Merge pull request #200 from dhrp/update-examples

Update examples

docs/sources/documentation/examples/hello_world.rst

@@ -8,19 +8,34 @@ Hello World
 ===========
 This is the most basic example available for using docker
 
-This example assumes you have Docker installed and it will download the busybox image and then use that image to run a simple echo command, that will echo hello world back to the console over standard out.
+This example assumes you have Docker installed.
+
+
+Download the base container
+
+.. code-block:: bash
+
+    # Download a base image
+    docker pull base
+
+The *base* image is a minimal *ubuntu* based container, alternatively you can select *busybox*, a bare
+minimal linux system. The images are retrieved from the docker repository.
+
 
 .. code-block:: bash
 
-    $ docker run busybox /bin/echo hello world
+    #run a simple echo command, that will echo hello world back to the console over standard out.
+    docker run base /bin/echo hello world
 
 **Explanation:**
 
 - **"docker run"** run a command in a new container 
-- **"busybox"** is the image we want to run the command inside of.
+- **"base"** is the image we want to run the command inside of.
 - **"/bin/echo"** is the command we want to run in the container
 - **"hello world"** is the input for the echo command
 
+
+
 **Video:**
 
 See the example in action
@@ -28,7 +43,8 @@ See the example in action
 .. raw:: html
 
     <div style="margin-top:10px;">
-      <iframe width="560" height="350" src="http://ascii.io/a/2561/raw" frameborder="0"></iframe>
+      <iframe width="560" height="350" src="http://ascii.io/a/2603/raw" frameborder="0"></iframe>
     </div>
 
+
 Continue to the :ref:`hello_world_daemon` example.

docs/sources/documentation/examples/hello_world_daemon.rst

@@ -8,18 +8,20 @@ Hello World Daemon
 ==================
 The most boring daemon ever written.
 
-This example assumes you have Docker installed and with the busybox image already imported. We will use the busybox image to run a simple hello world daemon that will just print hello world to standard out every second. It will continue to do this until we stop it.
+This example assumes you have Docker installed and with the base image already imported ``docker pull base``.
+We will use the base image to run a simple hello world daemon that will just print hello world to standard
+out every second. It will continue to do this until we stop it.
 
 **Steps:**
 
 .. code-block:: bash
 
-    $ CONTAINER_ID=$(docker run -d busybox /bin/sh -c "while true; do echo hello world; sleep 1; done")
+    $ CONTAINER_ID=$(docker run -d base /bin/sh -c "while true; do echo hello world; sleep 1; done")
 
 We are going to run a simple hello world daemon in a new container made from the busybox daemon.
 
 - **"docker run -d "** run a command in a new container. We pass "-d" so it runs as a daemon.
-- **"busybox"** is the image we want to run the command inside of.
+- **"base"** is the image we want to run the command inside of.
 - **"/bin/sh -c"** is the command we want to run in the container
 - **"while true; do echo hello world; sleep 1; done"** is the mini script we want to run, that will just print hello world once a second until we stop it.
 - **$CONTAINER_ID** the output of the run command will return a container id, we can use in future commands to see what is going on with this process.
@@ -35,7 +37,7 @@ Check the logs make sure it is working correctly.
 
 .. code-block:: bash
 
-    $ docker attach $CONTAINER_ID
+    docker attach $CONTAINER_ID
 
 Attach to the container to see the results in realtime.
 
@@ -44,7 +46,7 @@ Attach to the container to see the results in realtime.
 
 .. code-block:: bash
 
-    $ docker ps
+    docker ps
 
 Check the process list to make sure it is running.
 
@@ -61,7 +63,7 @@ Stop the container, since we don't need it anymore.
 
 .. code-block:: bash
 
-    $ docker ps
+    docker ps
 
 Make sure it is really stopped.
 
@@ -76,4 +78,12 @@ See the example in action
       <iframe width="560" height="350" src="http://ascii.io/a/2562/raw" frameborder="0"></iframe>
     </div>
 
-Continue to the :ref:`python_web_app` example.
+Continue to the :ref:`python_web_app` example.
+
+
+Notes:
+------
+
+- **Docker daemon** The docker daemon is started by ``sudo docker -d``, Vagrant may have started
+  the Docker daemon for you, but you will need to restart it this way if it was terminated. Otherwise
+  it may give you ``Couldn't create Tag store: open /var/lib/docker/repositories: permission denied``