How to install and configure Docker on Linux

How to install and configure Docker on Linux

Introduction:
Docker is an open source containerization platform that can easily package applications and their dependencies into containers so that they can be used in different It can run seamlessly on all operating systems. By using Docker, we can manage and deploy applications quickly and easily. This article will detail how to install and configure Docker on Linux and provide corresponding code examples.

Step 1: Install Docker

1. Update system software packages:
   sudo apt-get update
2. Install the necessary software packages to allow apt to pass HTTPS uses mirror source:
   sudo apt-get install apt-transport-https ca-certificates curl software-properties-common
3. Add Docker official GPG key:
   curl -fsSL https:// download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
4. Set Docker stable version repository:
   echo " deb [arch=amd64 signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" | sudo tee /etc /apt/sources.list.d/docker.list > /dev/null
5. Update package index:
   sudo apt-get update
6. Install the latest version of Docker Engine and containerd:
   sudo apt-get install docker-ce docker-ce-cli containerd.io
7. Verify that Docker is successfully installed:
   docker --version

Steps Two: Configure Docker

1. Create a Docker group:
   sudo groupadd docker
2. Add the current user to the docker group:
   sudo usermod -aG docker $USER
3. Exit the current terminal and log in again for the changes to take effect.

Step 3: Verify Docker installation and configuration

1. Run the hello-world image:
   docker run hello-world

   If On successful run, a message will be displayed stating that Docker is correctly installed and configured.

Step 4: Accelerate Docker image download (optional)
If you find that the speed of downloading the Docker image is slow, you can speed up the download speed by configuring a domestic acceleration source. Here's an example.

1. Edit the Docker configuration file:
   sudo nano /etc/docker/daemon.json

2. Add the following content to the file:
   {

   "registry-mirrors": ["https://mykfwk8w.mirror.aliyuncs.com"]

   }

3. Save and close the file.
4. Restart the Docker service:
   sudo systemctl restart docker

Summary:
This article introduces the process of installing and configuring Docker on Linux and provides the corresponding Code examples. By following the steps above, you can easily install and configure Docker on your Linux system and start using this powerful containerization platform to manage and deploy applications. Wish you a happy Docker journey!

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