How to check whether docker is installed (a brief analysis of the method)

Docker is a popular open source containerization platform that helps developers build and deliver applications faster and easier. Before using Docker, you must first confirm whether Docker has been installed on the system. This article will introduce how to check whether Docker is installed on different platforms.

1. Check whether Docker is installed on Linux

On Linux, you can use the following command to check whether Docker is installed:

docker --version

This command will Displays the installed Docker version. If Docker is not installed, it will prompt that the command cannot be found.

If it is an Ubuntu or Debian system, you can use the following command to install Docker:

sudo apt update
sudo apt install docker.io

If it is a CentOS system, you can use the following command to install Docker:

sudo yum install docker-ce

After the installation is complete, run the "docker --version" command again to check whether Docker has been installed successfully.

2. Check if Docker is installed on Windows

On Windows, you can use the following steps to check if Docker is installed:

• In In the Windows taskbar, find and open the Docker desktop application.
• In the Docker application, click the "Docker Desktop" tab.
• Look at the system tray in the lower right corner of the screen. If you see the Docker icon, it means it is installed.

If Docker is not installed, you need to download and install the Docker Desktop application from the Docker official website.

3. Check to see if Docker is installed on your Mac

On your Mac, you can use the following steps to check if Docker is installed:

• In In the Launchpad application of the Mac operating system, open the "Terminal" terminal program.
• Run the "docker --version" command in the terminal to see if Docker is installed.

If Docker is not installed, you need to download and install the Docker Desktop application from the Docker official website.

Summary

Checking whether Docker is installed is very simple, just use the corresponding command or application. Whether you're on Linux, Windows, or Mac, you can check and install using similar methods. After ensuring that Docker is installed, you can start enjoying the convenience and efficiency brought by Docker.

The above is the detailed content of How to check whether docker is installed (a brief analysis of the method). For more information, please follow other related articles on the PHP Chinese website!