keep this as a quick guide on how to install a docker on Ubuntu 20.04
The simple idea of the docker is a set of platform-as-a-service products used to launch and manage containers. Developers use Docker containers for developing and deploying applications because they provide isolated, lightweight, virtual environments.
- Ubuntu 20.04 Installed on 64-bit operating system
- A user account with sudo privilege
All the commands are executed as sudo user, so bear in mind that you might have to prepend
sudo to all the below commands.
I run all these steps as the root user. If you are not root, either prepend
sudo to the commands or use the simulate initial login option of
sudo to start an interactive shell as root:
- Command-line/terminal (Ctrl+Alt+T or Applications menu > Accessories > Terminal)
- Docker software repositories (optional)
Step 1: Updating the Software Repository
Docker Registry is an application that manages to store and delivering Docker container images. Registries centralize container images and reduce build times for developers.
Docker images guarantee the same runtime environment through virtualization, but building an image can involve a significant time investment.
For example, rather than installing dependencies and packages separately to use Docker, developers can download a compressed image from a registry that contains all of the necessary components.
Start by opening a terminal window and updating the local repository:
sudo apt update
Wait for the process to complete.
Step 2: Downloading Dependencies
Allow your Ubuntu 20.04 system to access the Docker repositories over HTTPS by running:
sudo apt-get install apt-transport-https ca-certificates curl software-properties-common
The above-mentioned command:
- Gives the package manager permission to transfer files and data over https.
- Allows the system to check security certificates.
- Installs curl, a tool for transferring data.
- Adds scripts for managing software.
Step 3: Adding Docker’s GPG Key
Next, add the GPG key to ensure the authenticity of the software package:
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
Step 4: Installing the Docker Repository
Now install the Docker repository using the command:
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
The command installs the latest repository for your specific Ubuntu release
Step 5: Installing the Latest Docker
Start by updating the repository again:
sudo apt update
Now you can install the latest Docker version with:
sudo apt-get install docker-ce
Step 6: Verifying Docker Installation
To confirm the installation check the version of Docker:
Step 7: Enable Docker Service
To start the Docker service run the following commands:
sudo systemctl start docker
Enable Docker to run at startup with
sudo systemctl enable docker
To check the status of the service, use the command:
sudo systemctl status docker
The output should show Docker is
This article should have helped you install and get started with Docker on Ubuntu 20.04. Keep readings :)