How to start the display process in docker

Docker is currently the most popular containerization technology, which provides a portable, deployable, and scalable environment for applications. Docker makes it easy to create, deploy, and manage a variety of applications.

In Docker, containers are the main way to run applications. Containers are isolated application execution environments, in which all programs run within isolated namespaces and Cgroups containers. When you launch a container, Docker will provide an isolated environment for the application and ensure the stability and security of the application.

However, when using Docker to run a container, you may encounter problems, such as no process being displayed after the container is started. In this article, we will introduce how to start a Docker container and display the process.

The basic command for Docker to start a container is "docker run". The specific syntax is as follows:

docker run [OPTIONS] IMAGE [COMMAND] [ARG...]

Among them, OPTIONS is the option for Docker to run the container, IMAGE is the name of the image to be started, and COMMAND is the container The command to be run, ARGs are the arguments passed to the command.

When starting a container, you can use the "docker ps" command to view the running container:

docker ps

In addition, you can also use the "docker logs" command to view the log information of the container:

docker logs CONTAINER_ID

Among them, CONTAINER_ID is the ID of the Docker container.

If you only want to view the logs of the currently running container, please use the following command:

docker logs $(docker ps -q)

This command will only display the logs of the running container.

However, sometimes you need to directly display the running process when the container starts. This can be achieved by using the "-it" option and the "/bin/bash" command when the container starts, for example:

docker run -it IMAGE /bin/bash

This command will start a new container and enter the container's console, which contains a list of running processes.

In a Docker container, you can use common Linux commands to display running processes, such as the "ps" command to list all processes:

ps aux

If you only need to display For specific processes, you can use filters. For example, to display processes named "nginx", you can use the following command:

ps aux | grep nginx

This will list all processes named "nginx".

Summary

Starting a container in Docker and displaying the process is a very basic task. By using the "-it" option and the "/bin/bash" command, you can easily step into the container and display the running processes. In the container console, you can use common Linux commands to display processes. Docker is a powerful containerization technology that can make your job easier by managing applications efficiently.

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