Docker Commands usage and Working with Docker images

1. docker --version

   Usage: docker --version 

   This command is used to get the currently installed version of docker.

   

2. docker pull 

  Usage: docker pull <image name>

  Eg: docker pull ubuntu 

 This command is used to pull an image or a repository from the docker registry (hub.docker.com)

3. docker run 

    Usage: docker run -it -d <image name>

    Eg: docker run -it -d ubuntu

  -i: -- interactive = keep STDIN open even if  not attached

  -t: --tty = Allocate a pseudo-TTY

  -d: --detach = Run container in background and print container ID

  This command is used to create a container from an Image 

4. docker ps

   Usage: docker ps 

   This command is used to display the running containers    

 

5. docker ps -a

    Usage: docker ps -a 

     -a: --all = show all containers

    This command is used to show all running and exited containers

6. docker ps -l

     Usage: docker ps -l

     -l: --latest = show the latest created container (includes all states like exited/ running)

     This command is used to show the latest created container 

7.  docker exec 

    Usage: docker exec -it <container id> bash

     Eg: docker exec -it 29c10a7bf2ea bash

  -i: -- interactive = keep STDIN open even if  not attached

  -t: --tty = Allocate a pseudo-TTY

8. docker stop
     If we want to stop all the running containers at a time, then use the below command
     Method 1:
   Usage: docker container stop $(docker container ls -aq)

     Method 2: 
Usage: docker stop <container id>

      Eg: docker stop 29c10a7bf2ea 

    This command is used to stop one or more running containers

9. docker commit
     Usage: docker commit <container id>  <username/imagename>

     Eg: docker commit 29c10a7bf2ea krishnadasari610/ubuntu

This command is used to create new image of an edited container on the local system

Once we create a new image

10 docker login
     Usage: docker login
     1. If you are already logged into your docker hub account you will get the output like in the below image

  2. If you are login for the first time, you will get the Username and then the password like in the below image provide the necessary details 

11. docker logout
      Usage: docker logout
      This command is used to logout from the docker hub repository     

   
12. docker push
       Usage: docker push <username/ image name/id> 
  This command is used to push an image to the docker hub repository

   
    Check in the Docker hub repository whether the same repository is available or not. 
    Login required : https://hub.docker.com/?ref=login


13. docker images
      Usage: docker images
       This command will list all the locally stored images

14. docker rm
      If we want to remove all the stopped containers, then we can use the below command 
   Usage:docker rm $(docker ps -a -q)   
    
     
 Usage: docker rm <container id>
       This command is used to delete a stopped container

   1. If the container id is stopped then its status should be "Exited"
   

2. Remove the container and check the containers list 

15 docker rmi 
     Method 1: 
      Usage: docker rmi <Image Name / Image ID>

     This command is used to delete one or more images from the local storage

Method 2: Remove the all locally stored images 
Usage: docker rmi $(docker image -a -q )

16. docker build
      Usage: docker build </path/to/docker file> 
       Eg: docker build .
       This command is used to build an image from a specified docker file.
        Note: Open the terminal from the docker file location