Εγκατάσταση Docker σε Ubuntu

 sudo apt remove $(dpkg --get-selections docker.io docker-compose docker-compose-v2 docker-doc podman-docker containerd runc | cut -f1)

1. Set up Docker's apt repository.

   # Add Docker's official GPG key:
   sudo apt update
   sudo apt install ca-certificates curl
   sudo install -m 0755 -d /etc/apt/keyrings
   sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc
   sudo chmod a+r /etc/apt/keyrings/docker.asc
   
   # Add the repository to Apt sources:
   sudo tee /etc/apt/sources.list.d/docker.sources <<EOF
   Types: deb
   URIs: https://download.docker.com/linux/ubuntu
   Suites: $(. /etc/os-release && echo "${UBUNTU_CODENAME:-$VERSION_CODENAME}")
   Components: stable
   Signed-By: /etc/apt/keyrings/docker.asc
   EOF
   
   sudo apt update
   

2. Install the Docker packages.
   LatestSpecific version
   To install the latest version, run:

    sudo apt install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
   
   

   Note
   The Docker service starts automatically after installation. To verify that Docker is running, use:

    sudo systemctl status docker
   
   

   Some systems may have this behavior disabled and will require a manual start:

    sudo systemctl start docker
   
   

3. Verify that the installation is successful by running the hello-world image:

    sudo docker run hello-world
   
   

   This command downloads a test image and runs it in a container. When the container runs, it prints a confirmation message and exits.