Installing Docker on Ubuntu 20.04

On the system (most likely a virtual machine) dedicated to Command Center, make sure you have the latest version of docker up and running. The following steps may help.

A user with sudo privileges is required to run most commands. The sudo user for Ubuntu may be 'ubuntu'.

[Install Docker Engine on Ubuntu]

Uninstall old docker versions

This is an optional step in case your docker version is out of date. Also to clean the system and start fresh.

   sudo apt-get remove docker docker-engine docker.io containerd runc

Install docker using the repository

   sudo apt-get update
   sudo apt-get install \
   ca-certificates \
   curl \
   gnupg

   sudo install -m 0755 -d /etc/apt/keyrings
   curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
   sudo chmod a+r /etc/apt/keyrings/docker.gpg

   echo \
   "deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
   "$(. /etc/os-release && echo "$VERSION_CODENAME")" stable" | \
   sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

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

Start Docker

Start docker using the following command:

   $ sudo systemctl start docker

Enable the Docker service to start automatically on system boot by running the following command:

   $ sudo systemctl enable docker

Verify that Docker Engine is installed correctly

Run the hello-world image.

   $ sudo docker run hello-world

This command will run a test container and display a message indicating that the installation is working properly.

If this is a new system, other packages may need to be installed, such as:

• git
• zip and unzip

Return to the Installation page to continue installing Command Center on the system