Simplifying Docker Installation on Linux

In the vast ocean of software development, containerization technology is like a reliable ship, helping developers sail smoothly in the surging waves of system differences and compatibility issues. Among the numerous containerized tools, Docker stands out for its reliability and ease of use and becomes a beacon for guiding the way. Docker can package the software and everything it needs to run (code, runtime environment, system tools, system libraries, etc.) into a complete system file to ensure that the software can maintain a consistent running state in any environment. This article will guide you to install Docker on Linux system and start your containerization journey.

Installation preparation

Before system requirements set sail, make sure your Linux system is ready to take advantage of Docker.

1. Check your Linux distribution and version : Docker supports Ubuntu, Debian, Fedora, CentOS and other distributions. Please make sure you are running a supported version.
2. Hardware Requirements : Although Docker is very lightweight, it is recommended that you ensure that the system meets the minimum hardware requirements. It is recommended to use a 64-bit architecture system and have at least 2GB of memory.

Updating the system package to sail using outdated maps is undoubtedly disastrous. Similarly, updating the system's package database before installing Docker ensures a smoother installation process.

1. Run the following command to update the list of available packages:

 sudo apt-get update

Installation method: Use the official warehouse

It is always wise to choose a calm water navigation. Installing Docker from an official repository is exactly the case.

Setting up Docker repository 1. Update the apt package index :

 sudo apt-get update

2. Install packages that allow apt to use repository over HTTPS :

 sudo apt-get install apt-transport-https ca-certificates curl gnupg lsb-release

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 up a stable version of the warehouse :

 echo \
"deb [arch=$(dpkg --print-architecture) 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

Install Docker Engine 1. Update the apt package index again (if not executed yet):

 sudo apt-get update

2. Install the latest versions of Docker Engine and containerd :

 sudo apt-get install docker-ce docker-ce-cli containerd.io

Verify installation 1. Run the Docker hello-world image :

 sudo docker run hello-world

2. Check the Docker version and make sure the daemon is running :

 docker --version

Installation method: Use convenient scripts (optional)

For developers who are time-intensive or prefer a simpler approach, Docker provides a convenient installation script.

1. Download and execute the script :

 curl -fsSL https://get.docker.com | sh

2. Verify the installation (as described above).

Docker Basic Commands

After installing Docker, understanding some basic commands will help you get started.

1. Start, stop and restart the Docker daemon :

 sudo systemctl start docker
sudo systemctl stop docker
sudo systemctl restart docker

2. Run the Docker container :

 docker run [IMAGE]

3. Get Docker image from Docker Hub :

 docker pull [IMAGE]

Conclusion

You have successfully installed Docker on your Linux system and have taken the first step toward the containerized world. After mastering the basic commands, the powerful features of Docker will be waiting for you to explore. The official Docker documentation is an excellent guide to gain insight into advanced configuration and optimization. I wish you all the best on your voyage at Docker!

The above is the detailed content of Simplifying Docker Installation on Linux. For more information, please follow other related articles on the PHP Chinese website!