Command to try using Docker for the time being


In this article, I made a note of how to use Docker when I wanted to use it for the time being.

Execution environment

Create a Docker Hub account You can create an account from this page.

Log in to Docker Hub


$ docker login

Enter the created user name and password


Login Succeeded

Pull image from Docker Hub Library


$ docker pull {image name}

hello-For world

latest: Pulling from library/hello-world
Digest: sha256:7f0a9f93b4aa3022c3a4c147a449bf11e0941a1fd0bf4a8e6c9408b2600777c5
Status: Image is up to date for hello-world:latest

Create a container from image and enter inside the container (if you just want to run it, you don't need -it)


$ docker run -it {image name}

Exit the container


$ exit

Exit with the container active

ctrl + p + q

View the container list


$ docker ps -a


CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS                        PORTS               NAMES
c48468f185c5        ubuntu              "/bin/bash"         26 hours ago        Exited (255) 20 minutes ago                       priceless_khayyam

View Local repository


$ docker images


REPOSITORY               TAG                 IMAGE ID            CREATED             SIZE
ubuntu                   latest              4e2eef94cd6b        2 weeks ago         73.9MB

Reactivate the container whose Status is Exited


$ docker restart {Container name}

You can confirm that STATUS is "UP ~ seconds" by pressing "docker ps -a" again.

Re-enter the launched container


$ docker exec -it {Container name}

commit and save the container as a new image


$ docker commit {Container name} {New image name}

You can check it with docker images.

Push image to Docker Hub


$ docker tag {Old image name:Old tag} {New image name:New tag}

Build image from Dockerfile (in the folder where Dockerfile is)


$ docker build .

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