Docker is a software for automating the deployment and management of applications in an operating system-level virtualization environment. It allows you to package an application with all its environment and dependencies into a container that can be ported to any Linux system with kernel cgroups support and provides a container management environment


    Before installing Docker, update the existing Ubuntu package list:
    sudo apt update

    Next, let's install the necessary packages that allow **apt** to use packages over HTTPS:  
    sudo apt install apt-transport-https ca-certificates curl software-properties-common  

    Add the GPG key of the official Docker repository to your system:
    curl -fsSL | sudo apt-key add -

    Add Docker repository to the list of APT package sources:  
    sudo add-apt-repository "deb [arch=amd64] focal stable"  

    Then update the packages database with information about Docker packages from the newly added repository:
    sudo apt update

    To make sure to install Docker from the Docker repository and not from the default Ubuntu repository, run the command:  
    apt-cache policy docker-ce  

    [email protected]:~# apt-cache policy docker-ce
    Installed: (none)
    Candidate: 5:19.03.11~3-0~ubuntu-focal
    Version table:
    5:19.03.11~3-0~ubuntu-focal 500
    500 focal/stable amd64 Packages
    5:19.03.10~3-0~ubuntu-focal 500
    500 focal/stable amd64 Packages
    5:19.03.9~3-0~ubuntu-focal 500
    500 focal/stable amd64 Packages

    Note that docker-ce is not installed, but is a candidate to install from the Docker repository for Ubuntu 20.04 (focal version).  
    Installing Docker:  
    sudo apt install docker-ce  

    Docker is installed, the process will start at system startup.

    Let's check that the process is running:
    sudo systemctl status docker

    [email protected]:~# sudo systemctl status docker  
    Docker.service - Docker Application Container Engine  
         Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
         Active: active (running) since Mon 2020-06-22 16:19:04 MSK; 18s ago
    TriggeredBy: ● docker.socket  
       Main PID: 3289 (dockerd)
          Tasks: 8
         Memory: 36.3M
         CGroup: /system.slice/docker.service
                 └─3289 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
    Jun 22 16:19:03 dockerd[3289]: time="2020-06-22T16:19:03.447245632+03&gt  
    Jun 22 16:19:03 dockerd[3289]: time="2020-06-22T16:19:03.447627302+03&gt  
    Jun 22 16:19:03 dockerd[3289]: time="2020-06-22T16:19:03.448236842+03&gt  
    Jun 22 16:19:03 dockerd[3289]: time="2020-06-22T16:19:03.449654437+03&gt  
    Jun 22 16:19:03 dockerd[3289]: time="2020-06-22T16:19:03.896983152+03&gt  
    Jun 22 16:19:04 dockerd[3289]: time="2020-06-22T16:19:04.107198555+03&gt  
    Jun 22 16:19:04 dockerd[3289]: time="2020-06-22T16:19:04.244408196+03&gt  
    Jun 22 16:19:04 dockerd[3289]: time="2020-06-22T16:19:04.245672224+03&gt  
    Jun 22 16:19:04 systemd[1]: Started Docker Application Container Engi&gt  
    Jun 22 16:19:04 dockerd[3289]: time="2020-06-22T16:19:04.396727868+03  

    When we install Docker, we get not only the Docker service, but also the docker command line utility or the Docker client.

    You can also use our One-Click-Apps for one-click installation to install Docker
    To do so, select the required VPS plan and select Apps → Docker, to install.


    If you have any configuration difficulties or have additional questions, you can always contact our support team via ticket system.