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This article mainly explains "what are the commonly used command lines for getting started with Docker". The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn what command lines are commonly used for getting started with Docker.

Foreword

The Docker image consists of Dockerfile and some necessary dependencies, and the Docker container is a dynamic Docker image. To use the Docker command, you first need to know whether you are working with an image or a container. Once you know whether you are dealing with a mirror or a container, you can find the correct command.

The commonness of commands

You need to know some rules about the Docker command:

Docker CLI administrative commands start with docker, then spaces, then administrative categories, then spaces and finally commands. For example, the command docker container stop stops the container.

Commands that reference a specific container or image require the name or ID of the container or image.

For example, docker container run my_app is the command used to build and run a container named my_app. In the example in this article, I will use the name my_container to refer to the generic container. Similarly, the same is true of my_image and my_tag.

I will provide commands and generic logos separately. The sign with two dashes in front of it is the full name of the sign. The flag with a dash is the abbreviation of the full logo name. For example,-p is an abbreviation for the-- port flag.

The goal of this article is to keep these commands and tags in mind, and hopefully you can use this guide as a reference when creating containers or building images. This guide applies to Linux and Docker Engine versions 18.09.1 and API version 1.39.

Let's learn about the container command and then look at the mirror command.

Container command

Use docker container my_command

Create-create a container from the mirror

Start-start an existing container

Run-create a new container and start it

Ls-lists containers that are running

Inspect-View information about the container

Logs-print the log

Stop-gracefully stop a running container

Kill-stop the main processes in the container immediately

Rm-Delete containers that have been stopped

Mirror command

Use docker image my_command

Build-build a mirror

Push-push the mirror to the remote mirror repository

Ls-list mirrors

History-View intermediate image information

Inspect-View information about mirrors, including layers

Rm-Delete Mirror

Container & Mirror

Docker version-lists information about the Docker client and server version

Docker login-Log in to the Docker image repository

Docker system prune-removes all unused containers, networks, and unnamed images (virtual overhang)

Detailed explanation of container command

Start the container

The terms "create", "start" and "run" all have similar semantics in daily life, but each is a separate Docker command for creating and / or launching containers. Let's first look at the command to create a container.

Docker container create my_repo/my_image:my_tag-create a container from an image

I will abbreviate my_repo/my_image:my_tag to my_image below.

You can create by passing many logos.

Docker container create-a STDIN my_image

-an is an abbreviation for-attach, which refers to connecting a container to a STDIN,STDOUT or STDERR.

Now that we have created a container, let's start it.

Docker container start my_container-start an existing container

Note that the container can be referenced by the container's ID or the name of the container.

Docker container start my_container

Now that you know how to create and start a container, let's look at the most common Docker commands. It combines create and start into one command: run.

Docker container run my_image-create a new container and start it. There are also many options for this command. Let's take a look at some of them.

Docker container run-I-t-p 1000R 8000-- rm my_image

-I is an acronym for-interactive to keep STDIN open even if it is not connected;-t is an abbreviation for-tty, which allocates a pseudo terminal to connect the terminal to the container's STDIN and STDOUT.

You need to specify-I and-t to interact with the container through the terminal shell.

-p is the abbreviation of-port. A port is an interface with the outside world. 1000 8000 maps Docker port 8000 to port 1000 on the computer. If you have an app that outputs something to the browser, you can navigate the browser to localhost:1000 and view it.

-- rm automatically deletes containers that are not running.

Let's look at a few more examples of run.

Docker container run-it my_image my_command

Sh is a command that you can specify at run time. It will start a shell session inside the container and you can interact with it through the terminal. For Alpine images, sh is better than bash because Alpine images are not installed with bash. Type exit to end the interactive shell session.

Notice that we combine-I and-t into-it.

Docker container run-d my_image

-d is an acronym for-detach, which means to run the container in the background, allowing you to use the terminal for other commands while the container is running.

Check container status

If you have many running Docker containers and want to find out which one to interact with, you need to list them.

Docker container ls-lists the containers that are running and provides useful information about the containers.

Docker container ls-a-s

-an is an acronym for-- all, listing all containers (not just running containers)

-s is an abbreviation for-size, listing the size of each container.

Docker container inspect my_container-View information about the container

Docker container logs my_container-list container logs

Termination container

Sometimes you need to stop a running container, you need to use the following command:

Docker container stop my_container-gracefully stop one or more running containers. Provide a default of 10 seconds to complete any process before the container is closed.

If you think 10 seconds is too long, you can use the following command:

Docker container kill my_container-stop one or more running containers immediately. It's like unplugging the TV. In most cases, however, the stop command is recommended.

Docker container kill $(docker ps-Q)-terminates all running containers

You need to delete the container by using the following command:

Docker container rm my_container-Delete one or more containers

Docker container rm $(docker ps-a-Q)-Delete all containers that are not running

These are the key commands of the Docker container. Next, let's take a look at the commands for mirroring.

Detailed explanation of mirror command

Here are seven commands used by Docker mirroring

Build an image

Docker image build-t my_repo/my_image:my_tag. Builds a Docker image named my_image in the Dockerfile of the specified path or url.

-t is an abbreviation for tag, which tells docker to mark the image with the supplied tag, in this case, my_tag.

The full stop (.) at the end of the command Is to tell Docker to build the image based on the Dockerfile in the current working directory.

After you build the image, you want to push it to the remote repository so that it can be shared and pulled if necessary. Then the next command is very useful, although it is not a mirror command.

Docker login-Log in to the Docker image repository and type your user name and password when prompted

Docker image push my_repo/my_image:my_tag-push an image to the repository.

After you have these images, you may want to check them.

Check the mirror image

Docker image ls-list your images and the size of each image

Docker image history my_image-displays the intermediate image of the mirror, including the size and how it was created

Docker image inspect my_image-displays details about the mirror, including the layers that make up the mirror

Sometimes you need to clean up your mirror image.

Clean up the mirror

Docker image rm my_image-deletes the specified mirror. If the image is saved in the image repository, then the image is still available there.

Docker image rm $(docker images-a-Q)-removes all mirrors. This command must be used carefully. Please note that images that have been pushed to the remote repository can still be saved, which is one of the advantages of the image repository.

Thank you for your reading, the above is the content of "what is the command line commonly used for getting started with Docker"? after the study of this article, I believe you have a deeper understanding of what the command line commonly used for getting started with Docker has, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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