Installing Docker on Ubuntu 20.04

Docker is an open-source platform that allows you to automate the deployment, scaling, and management of applications using containerization. It provides a way to package applications and their dependencies into lightweight containers, which can then run on any system that has Docker installed.

Here is a step-by-step guide on how to install Docker on Ubuntu 20.04:

$ sudo apt update
$ sudo apt upgrade

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

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

$ 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

$ sudo apt update

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

$ sudo docker run hello-world

$ sudo usermod -aG docker $USER

1. Update the system:
2. Install necessary dependencies:
3. Add the Docker GPG key:
4. Add the Docker repository:
5. Update the package index:
6. Install Docker:
7. Verify that Docker is installed correctly:
8. Add your user to the docker group to run Docker commands without sudo:
9. Log out and log back in to apply the changes.

Once Docker is successfully installed, you can start using it to run and manage containers on your Ubuntu 20.04 system. Docker provides numerous features and commands to manage containers and images. It allows you to build, push, and pull container images from registries, create and manage containers, network and volume management, and much more.

Remember to regularly update Docker to benefit from the latest features and security patches.