How to do docker installation

In the field of software engineering, Docker has become a very popular technology. It helps developers package applications and their dependencies into self-contained containers that can run on any system and are not restricted by the operating system or other environments. This article will introduce how to install Docker on different operating systems.

Docker installation under Linux system

For almost all Linux distributions, Docker can be installed through the official software repository.

Docker installation under CentOS/RHEL system

For CentOS/RHEL system, execute the following command in the terminal:

sudo yum install -y yum-utils device-mapper-persistent-data lvm2
sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
sudo yum install docker-ce

Docker installation under Ubuntu system

For Ubuntu system, execute the following command in the terminal:

sudo apt-get update
sudo apt-get install apt-transport-https ca-certificates curl software-properties-common
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo apt-key fingerprint 0EBFCD88
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
sudo apt-get update
sudo apt-get install docker-ce

Docker installation under macOS system

Docker can be installed on macOS system by downloading the Docker installation package from the official website.

1. Open [Docker official website](https://www.docker.com/) and click the "Get Started" button.
2. Select the "Docker Desktop" option in the pop-up window, and then download the corresponding installation package.
3. After the installation is complete, start Docker and follow the prompts to initialize and set up.

Docker installation under Windows system

For Windows systems, Docker uses Windows 10 and Windows Server 2016 and above operating systems.

1. Open [Docker official website](https://www.docker.com/) and click the "Get Started" button.
2. Select the "Docker Desktop for Windows" option in the pop-up window, and then download the corresponding installation package.
3. After the installation is complete, start Docker and follow the prompts to initialize and set up.

It should be noted that under Windows systems, Docker needs to enable the Hyper-V virtualization component. If your computer does not support Hyper-V, you need to use Docker Toolbox to install Docker.

Common Docker commands

After the installation is complete, open the terminal and enter the following command to check the Docker version:

docker version

The following introduces several commonly used Docker commands:

• Start the Docker service:

systemctl start docker

• Stop the Docker service:

systemctl stop docker

• Restart the Docker service:

systemctl restart docker

• View all Docker containers in the current system:

docker ps

• Create a new Docker image locally:

docker build [OPTIONS] PATH

• Run a new Docker container locally:

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

The above commands are only part of Docker. For more detailed commands, please refer to the official Docker documentation.

Summary

Through the above introduction, you should already know how to install Docker under Linux/macOS/Windows system, and master the commonly used Docker commands. Now, you can use Docker to build your own application containers for application deployment and testing.

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