Docker Command

sudo usermod -aG docker username //we install docker using root user. To avoid this we add docker to get the usurpermission else we will need sudo in all command.
    docker pull redis // Pull redis image from docker hub
    docker ps // List of Running container
    docker ps -a // List of all container
    run -d redis // run the image
    docker ps
    docker images // List docker images
    docker run redis //create and exit
    docker ps
    docker run -d redis // run image in background
    docker ps
    docker stop 0e6faedbda22(Container Id) // Stop container Id
    docker ps
    docker start 0e6faedbda22 // start container 
    docker ps
    docker run redis:4.0 // docker run pulls image and start container
    docker run -d python // run in background
    Container needs to run on different port to interact with applications.
    Multiple container runs on host machine
    Laptop has certain ports
    Conflict when same port on host machine. However you can have two container with same port if host binding is done
    Ex - We have local host and then host will figure out how it will bind locally. We will bind the port using run command
    Stop all container
    docker run -p6000:6379 redis//port binding
    docker ps 
    docker ps -a // taker container id
    docker start eb5a656fed1c
    docker ps //Check if binding is done. This port can nnot be used by other container
    docker run -d -it -p6000:6739 imagename
    docker run -d -p6000:6379 --name redis-older redis:4.0
    docker run -dit -p6002:6379 --name python-new httpd
    docker image rm -f (nameofimage or name:version) // Delete image
    docker container rm -f (nameofcontainer or container) // Delete Container

    Debugging Docker
    docker logs container id //Logs of container
    Log inside container
    docker exec -it 86afc34c792b /bin/bash
    to exit type exit.