dockerBasics.md

@@ -53,12 +53,12 @@ Docker Hub is the official online repository where you could find all the Docker
 # Docker Installation
 
 1. Uninstall the older version of docker if is already installed
-```
+```sh
 $ sudo apt-get remove docker docker-engine docker.io containerd runc
 ```
 
 2. Installing CE (Community Docker Engine)
-```
+```sh
 $ sudo apt-get update
 $ sudo apt-get install \
     apt-transport-https \
@@ -87,13 +87,13 @@ $ sudo docker run hello-world
 ## docker create
   * This command allows us to create a new container.
   * Syntax
-```
+```sh
 docker create [options] IMAGE [commands] [arguments]
 ```
 `Note: Anything enclosed within the square brackets is optional.`
 
 e.g.
-```
+```sh
 $ docker create fedora
 
 02576e880a2ccbb4ce5c51032ea3b3bb8316e5b626861fc87d28627c810af03
@@ -106,7 +106,7 @@ Refer given link for more details.
 
 ## docker ps
   * The docker ps command allows us to view all the containers that are running on the Docker Host.
-```
+```sh
 $ docker ps
 
 CONTAINER ID IMAGE  COMMAND CREATED        STATUS            PORTS NAMES
@@ -130,15 +130,15 @@ docker ps output details
 ## docker start
   * This command starts any stopped container(s).
   * Syntax
-```
+```sh
 $ docker start [options] CONTAINER ID/NAME [CONTAINER ID/NAME…]
 ```
   * Example
-```
+```sh
 $ docker start 30986
 ```
 In the above example, Docker starts the container beginning with the container ID 30986.
-```
+```sh
 $ docker start sneha
 ```
 Whereas in this example, Docker starts the container named sneha.
@@ -146,15 +146,15 @@ Whereas in this example, Docker starts the container named sneha.
 ## docker stop
  * This command stops any running container(s).
  * Syntax
-```
+```sh
 $ docker stop [options] CONTAINER ID/NAME [CONTAINER ID/NAME…]
 ```
  * Example
-```
+```sh
 $ docker stop 30986
 ```
 In the above example, Docker will stop the container beginning with the container ID 30986.
-```
+```sh
 $ docker stop sneha
 ```
 Whereas in this example, Docker will stop the container named sneha.
@@ -173,13 +173,13 @@ Whereas in this example, Docker will stop the container named sneha.
 0 directories, 2 files
 ```
 2. Edit main.py
-```
+```sh
 #!/usr/bin/env python3
 
 print("Docker is magic!")
 ```
 3. Edit Dockerfile
-```
+```sh
 # A dockerfile must always start by importing the base image.
 # We use the keyword 'FROM' to do that.
 # In our example, we want import the python image.
@@ -200,14 +200,14 @@ CMD [ "python", "./main.py" ]
 ```
 4. Create the Docker image
    * Once your code is ready and the Dockerfile is written, all you have to do is create your image to contain your application.
-```
+```sh
 $ docker build -t python-test . 
 ```
    * The ’-t’ option allows you to define the name of your image. In our case we have chosen ’python-test’ but you can put what you want.
 
 5.  Run the Docker image
    * Once the image is created, your code is ready to be launched.
-```
+```sh
 $ docker run python-test
 ```
    * You need to put the name of your image after `docker run`.
@@ -224,17 +224,17 @@ Click on Create Repository button, put the name and enter.
 ![repo2](extras/repo2.png)
 
 3. Now we will tag the image and push it to dockerhub repository which we just created.
-```
+```sh
 # Run this commend to list docker images
 $ docker images
 ```
 which will give you this list
-```
+```sh
 REPOSITORY                 TAG                 IMAGE ID            CREATED             SIZE
 snehabhapkar/python-test   latest              c7857f97ebbd        2 hours ago         933MB
 ```
 Image ID is used to tag the image. So lets tag syntax is `docker tag <image-id of docker-whale> <your dockerhub username>/docker-whale:latest`
-```
+```sh
 $ docker tag c7857f97ebbd snehabhapkar/python-test:latest
 # Push image to the repository
 $ docker push snehabhapkar/python-test
@@ -243,12 +243,12 @@ $ docker push snehabhapkar/python-test
 ## Pull and run the image
 
 1. Let’s remove all versions of python-test image on our local system. Use Image ID to do that.
-```
+```sh
 $ docker rmi -f c7857f97ebbd
 ```
 
 2. Lets run the image, if it doesn't find it on local machine, it fetched it from dockerhub and run.
-```
+```sh
 $ docker run snehabhapkar/python-test
 ```
 This will give the desired output.