In this procedure, I will explain how to install Docker on a Debian 11 machine. Installing Docker on a Debian virtual machine allows to keep the use of virtual machines and containers simultaneously. Docker is a virtualization tool, easy to use and very light. Moreover Docker has the advantage to keep the same environment for development and production. Docker will use only the performance it needs, and then it will bridge the machine that hosts it to choose the ports and volumes it will use.
Prerequisites to install Docker on Debian 11:
- A Debian machine
- A root access on the machine
Install Docker on Debian 11:
To begin the installation of docker on Debian, we will start with an update of the machine :
Then the installation of the dependencies:
apt-get install \ apt-transport-https \ ca-certificates \ curl \ gnupg \ lsb-release
Then, we add the official GPG key of Docker :
curl -fsSL https://download.docker.com/linux/debian/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
Adding the Docker repository in the sources :
echo \ "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/debian \ $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
Then we update the list of sources:
Then, we download the Docker package from the :
apt install docker-ce docker-ce-cli containerd.io
Finally we check the installation of Docker on the machine:
docker run hello-world
If you get the same results as below, the installation of Docker is successful on your machine:
Recommendations for using Docker :
If you have never used Docker, you can use Portainer which is a graphical interface to manage containers.
Some useful commands to use Docker :
systemctl start/stop docker # Start/stop docker service systemctl enable docker # Activate docker at system startup docker pull # Download a Docker image docker ps # List all active Containers docker ps -a # List all Containers docker start/stop CONTAINER ID # Start/Stop Container docker rm CONTAINER ID # Delete Container by ID docker kill CONTAINER ID # Shutting down a container by ID docker images # List all the Docker images that have been downloaded
The commands are also on the official site of Docker: https://docs.docker.com/.
Docker is widely used to host applications because it allows to emulate a machine with dependencies (used by developers).
Don’t forget to secure your Docker server with Fail2ban and a Firewall like UFW (UFW Firewall on Debian 11).