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Installing Docker on your Virtual Desktop

Docker is a tool that simplifies the process of managing application processes in containers. Containers allow you to package up an application with all of the parts it needs, such as libraries and other dependencies, and deploy it as one package.

Containers let you run your applications in resource-isolated processes, allowing them to be portable between different systems. Containers are similar to virtual machines, but containers are more portable, more resource-friendly, and more dependent on the host operating system.

Instructions for Linux

Installing Docker on a Linux Virtual Desktop

1. Install Docker

In your Linux Virtual Desktop, open the terminal and update the existing list of packages:

sudo apt update

Next, install prerequisite packages:

sudo apt install apt-transport-https ca-certificates curl software-properties-common

Then add the GPG key for the official Docker repository:

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

Add the Docker repository to apt sources:

sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu bionic stable"

Next, update the package database with the Docker packages:

sudo apt update

Finally, install Docker:

sudo apt install docker-ce

2. Configure Docker to use a proxy

In Virtual Desktops, access to the Internet is restricted, so you need to configure Docker to use a proxy.

Create a systemd drop-in directory for the docker service:

sudo mkdir /etc/systemd/system/docker.service.d

In this new directory, create proxy.conf file:

sudo nano /etc/systemd/system/docker.service.d/proxy.conf

The command will open nano editor in the terminal. Paste the following content, and then click Ctrl+S, Ctrl+X:

Environment="HTTPS_PROXY=" "NO_PROXY=localhost,,::1"

Restart the Docker service:

sudo systemctl daemon-reload
sudo systemctl restart docker

3. Use Docker without sudo

In order to avoid typing sudo whenever you run the docker command, add workspace user to the docker group:

sudo usermod -aG docker workspace

For changes to take effect, you must restart the VM.

4. Test the installation

Check whether you can access and download images from the Docker Hub:

docker run hello-world

The output will indicate whether Docker is working correctly:

Updated on March 23, 2021

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