Скачать или смотреть What is Docker and how to install it on Ubuntu 20.04

What is Docker

Docker is an open platform for developing, shipping, and running applications. Docker enables you to separate your applications from your infrastructure so you can deliver software quickly. With Docker, you can manage your infrastructure in the same ways you manage your applications. By taking advantage of Docker’s methodologies for shipping, testing, and deploying code quickly, you can significantly reduce the delay between writing code and running it in production.
You can download and install Docker on multiple platforms.

https://docs.docker.com/

Docker Desktop for Mac
A native application using the macOS sandbox security model which delivers all Docker tools to your Mac.

Docker Desktop for Windows
A native Windows application which delivers all Docker tools to your Windows computer.

Docker for Linux
Install Docker on a computer which already has a Linux distribution installed.

LINUX OS requirements
To install Docker Engine, you need the 64-bit version of one of these Ubuntu versions:
• Ubuntu Hirsute 21.04
• Ubuntu Focal 20.04 (LTS)
• Ubuntu Bionic 18.04 (LTS)
Installation Steps on Linux Ubuntu 20.04
Step 1: Install the Docker Engine CE by setting up the Docker repository
● Use the following command to update the apt package:
sudo apt-get update
sudo apt-get install apt-transport-https ca-certificates curl software-properties-common

● Use the following curl command to add Docker’s official GPG key:
curl -fsSL https://download.docker.com/linux/ubu... | sudo apt-key add -
● Use the following commands to install the latest version of Docker CE and check the version:
sudo apt-get install docker-ce
docker –version
Step 2: Verify the correctly installed Docker engine
● Use the following command to verify the Docker engine:
sudo docker run hello-world
Uninstall the Docker Engine Community package using the purge command
● Use the following command to uninstall Docker Engine:
sudo apt-get purge docker-ce docker-ce-cli containerd.io