Quick and Clear Guide to Install Docker on Ubuntu

Step 1: Update System Packages
Before installing Docker, ensure that your system packages are up-to-date by running the following commands:

```
sudo apt update
sudo apt upgrade
```

sorry, because warpcast not support markdown, just run

sudo apt update
sudo apt upgrade

forget ``` 😅

Step 2: Install Docker Dependencies
Install the necessary packages to allow apt to use a repository over HTTPS and ensure compatibility with Docker:

sudo apt install apt-transport-https ca-certificates curl software-properties-common

Step 3: Add Docker GPG Key
Add Docker’s official GPG key to verify the integrity of the packages:

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

Step 4: Set Up Docker Repository
Add the Docker repository to your system:

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

Step 5: Install Docker Engine
Update the apt package index and install Docker Engine:
sudo apt update
sudo apt install docker-ce docker-ce-cli containerd.io

Step 6: Verify Docker Installation
Check if Docker is successfully installed by running the following command:
sudo docker --version

Step 7: Run a Test Container
Ensure that Docker is working by running a test container:

sudo docker run hello-world

Conclusion:
Congratulations! You have successfully installed Docker on your Ubuntu system. This lightweight and efficient containerization platform enables you to deploy and manage applications seamlessly. Explore Docker's extensive features to enhance your development and deployment workflows.

Docker is a powerful platform for automating the deployment and scaling of applications in lightweight, portable containers. This tutorial will guide you through the straightforward process of installing Docker on an Ubuntu system.