![]() Now, we have installed Docker successfully, let’s move on to installing Docker-Compose. Note: exit out of the terminal for the change to take effect, and check the docker verion once more. But, what if we don’t want to use sudo all the times in this case, we will assign the non-root user to docker group as follows: sudo usermod -aG docker $USER You might notice that we have received a permission denied message because we have not used sudo in front of the command and we are not the root user. Let’s run the following command to find out the Docker version we have just installed. Share images, automate workflows, and more with a free Docker ID: To try something more ambitious, you can run an Ubuntu container with: The Docker daemon streamed that output to the Docker client, which sent it The Docker daemon created a new container from that image which runs theĮxecutable that produces the output you are currently reading.Ĥ. The Docker daemon pulled the "hello-world" image from the Docker Hub.ģ. The Docker client contacted the Docker daemon.Ģ. To generate this message, Docker took the following steps:ġ. This message shows that your installation appears to be working correctly. The response should be similar to the below: Hello from Docker! ![]() Let’s verify that we have installed Docker Engine by running the hello-world image. Sudo apt-get install docker-ce docker-ce-cli containerd.io $(lsb_release -cs) stable" | sudo tee /etc/apt//docker.list > /dev/nullįirstly, we will update the apt package index and then install the latest version of Docker Engine and containerd. Now, let’s use the following command to setup the stable repository for arm64. I would like to suggest studying the differences between amd64, 64 and armhf. Therefore, we will need to install Docker Engine that supports 64-bit operating system on an arm64 architecture such as our current Ubuntu 20.04 LTS on RPI 4. We have decided to utilize Ubuntu 20.04 LTS on our RPI 4 because it’s a 64-bit operating system. We should know that RPI 4 is an arm64 architecture, but the Raspberry Pi OS is a 32-bit operating system. If you need to install the CURL, type in $ sudo apt-get install curl -y curl -versionĭocker Engine is supported on x86_64 (or amd64), armhf, and arm64 architectures. If you were unable to download the GPG key, check if you have the CURL command-line utility installed on your Ubuntu 20.04 by typing $ curl –version. curl -fsSL | sudo gpg -dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg The commands below is to download and install Docker’s official GPG key, which is used to validate packages installed from Docker’s repository making sure they’re trusted. ![]() We will setup Docker’s repository and then install from them for ease of installation and upgrade tasks as it’s the recommended approach.ġ - Setup the Repository: sudo apt-get update The following approach is the method from the official Docker site. There are different methods to install Docker Engine. Removing these packages will free space and prevent your system from cluttering. If this is not the packages first time to run an update, there might have some unnecessary packages left for cleaning. The -y in the end of the command line will automatically enters “yes” as a confirmation before installing the updates. ![]() We will run the following update/upgrade commands. Updating and upgrading the operating system of the instance is always a good habit to have. Now, we have a secured connection with our instance, let’s update and upgrade the operating system. As of 11/25/21, if you were unable to install Docker on RPI-4 running Ubuntu 21.10, you may need to install extra kernel modules by running the following command $ sudo apt install linux-modules-extra-raspi Updating the Operating System
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