How to start the Docker engine

Docker is a popular containerization technology that allows developers to easily port and deploy applications in different environments. This article will introduce how to start the Docker engine.

Step One: Install Docker Engine

Before starting the Docker engine, it must be installed on the computer. The installation steps vary depending on the operating system. The following are the installation steps for some common operating systems:

Installation on Ubuntu

1. Update software sources: Use apt-get to update software sources

$ sudo apt-get update

2. Add Docker GPG key

$ sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 -- recv-keys 7EA0A9C3F273FCD8

3. Add Docker software source

$ sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/ linux/ubuntu $(lsb_release -cs) stable"

4. Update software source

$ sudo apt-get update

5. Install Docker

$ sudo apt-get install docker-ce

Install on CentOS

1. Update yum software source

$ sudo yum update

2. Install required packages

$ sudo yum install -y yum-utils device-mapper-persistent-data lvm2

3. Add Docker repository

$ sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo

4. Update yum cache

$ sudo yum makecache fast

5. Install Docker

$ sudo yum install docker-ce

Install on Windows

1. Download the Docker for Windows installer
2. Execute the installer and follow the prompts to install

Step 2: Start the Docker engine

After installing the Docker engine, you can start the Docker engine through the command line or GUI tool.

Command line startup

On Linux systems, you can start the Docker engine through the following command:

$ sudo service docker start

On Windows systems, The Docker engine can be started through the following command:

dockerd --register-service

GUI startup

On Windows systems, the Docker engine can be started through the Docker for Windows GUI:

1. Open the Docker for Windows application
2. Click the "Start" button
3. Complete

Step 3: Verify whether the Docker engine Started successfully

After starting the Docker engine, you can use the following command to verify whether it has started successfully:

$ docker version

If you can see the output after running the above command , the Docker engine has been started successfully.

Summary:

This article introduces how to install and start the Docker engine. After installing the Docker engine, you can use the command line or GUI tools to start the engine. To ensure that the engine has started successfully, you can use the docker version command to verify. Docker is a popular containerization technology that enables developers to easily port and deploy applications.

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