How to use docker running container

To run a Docker container, you need to execute in turn: pull the image (docker pull ) create the container (docker run -it --rm --name ) interactive container (docker exec -it /bin/bash) port mapping (docker run -it --rm --name my-nginx -p 8080:80 nginx) set environment variables (docker run -it --rm --name

How to run a Docker container

Running a Docker container involves the following steps:

1. Pull the mirror

First, you need to pull the required image. A mirror is an executable file containing applications, libraries, and dependencies. Use the following command to pull the image:

 <code>docker pull </code>

For example, to pull an Nginx image:

 <code>docker pull nginx</code>

2. Create a container

After pulling the image, you can use the docker run command to create the container. This command allows specifying the running configuration of the container, such as port mapping and environment variables. Here is a basic example:

 <code>docker run -it --rm --name  </code>

For example, to create a container named "my-nginx":

 <code>docker run -it --rm --name my-nginx nginx</code>

3. Interactive operation

After the container is created, you can enter the container using interactive mode. This allows execution of commands and viewing output within the container. Here are the commands to enter the container:

 <code>docker exec -it  /bin/bash</code>

4. Port Mapping

If the container needs to expose the port to communicate with the outside world, port mapping is required. This can be done with the -p flag, which specifies the host port and container port. The following example maps port 80 in the container to port 8080 on the host:

 <code>docker run -it --rm --name my-nginx -p 8080:80 nginx</code>

5. Environment variables

Environment variables can be set when creating containers so that applications within the container can access them. Use the -e flag to specify the environment variable as follows:

 <code>docker run -it --rm --name my-nginx -e MY_ENV_VAR=value nginx</code>

6. Stop and delete containers

When the container is no longer needed, you can stop it using the docker stop command and then delete it using the docker rm command. The following example shows how to stop and delete the "my-nginx" container:

 <code>docker stop my-nginx docker rm my-nginx</code>

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