Step-by-step installation on Ubuntu#

Uninstall old versions of Docker#

Older versions of Docker were called docker,, or docker-engine. If these are installed, uninstall them:

sudo apt-get remove docker docker-engine containerd runc -y

Install using the repository#

Set up the repository#

  • Update the apt package index and install packages to allow apt to use a repository over HTTPS:

sudo apt-get update
sudo apt-get install -y \
    apt-transport-https \
    ca-certificates \
    curl \
    gnupg \
  • Add Docker’s official GPG key:

curl -fsSL | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
  • Use the following command to set up the stable repository.

echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] \
  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

Install Docker Engine#

  • Update the apt package index, and install the latest version of Docker Engine and containerd

 sudo apt-get update
 sudo apt-get install -y docker-ce docker-ce-cli
  • Verify that Docker Engine is installed correctly by running the hello-world image.

sudo docker run hello-world
  • Add your user to docker group to be able to use docker without sudo

sudo usermod -aG docker $USER

Now you have to log out and log back in to apply the user group change.

Install Docker Compose#


Docker Compose relies on Docker Engine for any meaningful work, so make sure you have Docker Engine installed. (See the previous step.)

  • There are multiple ways to install docker-compose, we are going to use python3-pip, so make sure it’s installed on your system.

sudo apt-get install -y python3-pip
  • Run this command to install the current stable release of Docker Compose using pip:

sudo pip install docker-compose
  • Test the installation. It should be version >= 1.26.

docker-compose --version

Installing Reward#

  • Download the latest package and install it with dpkg.

curl -fsSLO "`uname -s`_`uname -m`.deb"
sudo dpkg -i "reward_`uname -s`_`uname -m`.deb"
reward install


If you face the error message docker api is unreachable, please make sure your user is in the docker group. Don’t forget to relog (log out and log back in).

  • Verify the installation

reward --version