Install Docker Service Ubuntu

How to Install and Setup Docker on Ubuntu 18.04. Docker is an open-source technology that is used to deploy applications through containers.It is a relatively new platform but is constantly updated and features a wide community of users. Docker is a software package that creates containers for application development. Learn how to Install Docker on Ubuntu 18.04 in this tutorial. Docker is an application that simplifies the process of managing application processes in containers. This guide explains how to use Ansible to automate the steps contained in our guide on How To Install and Use Docker on Ubuntu 18.04. Ansible is a mo. Install VNC Server with Gnome display on Ubuntu 18.04 away, 2 years ago 4 5 min read 3460 VNC Server is the software used to do VNC ( Virtual Network Computing ) desktops on Linux environments.

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May 06, 2021 Starting the Docker Service. Getting the Docker service to start on Ubuntu, all you need to do is use the following command. Sudo systemctl start docker. When you first install Docker to your Ubuntu system, it will be automatically started as part of the installation process. Stopping Docker on Ubuntu. Selecting A Server to Run Docker. Docker can be easily deployed on a ServerMania Cloud or Dedicated Server starting at as little as $5 per month, with hourly billing available. Cloud servers are instantly deployed, so you can install and begin using Docker in minutes. How to install Docker on Ubuntu. In this article, we will show you how to install Docker CE (Community Edition), create and run Docker containers on Ubuntu distribution. Installing Docker CE (Community Edition) in Ubuntu. To install Docker CE, first, you need to remove older versions of Docker were called docker, docker.io, or docker-engine from the system using the.

To get started with Docker Engine on Ubuntu, make sure youmeet the prerequisites, theninstall Docker.

Prerequisites

OS requirements

To install Docker Engine, you need the 64-bit version of one of these Ubuntuversions:

  • Ubuntu Groovy 20.10
  • Ubuntu Focal 20.04 (LTS)
  • Ubuntu Bionic 18.04 (LTS)
  • Ubuntu Xenial 16.04 (LTS)

Docker Engine is supported on x86_64 (or amd64), armhf, and arm64 architectures.

Uninstall old versions

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

It’s OK if apt-get reports that none of these packages are installed.

The contents of /var/lib/docker/, including images, containers, volumes, andnetworks, are preserved. If you do not need to save your existing data, and want tostart with a clean installation, refer to the uninstall Docker Enginesection at the bottom of this page.

Supported storage drivers

Docker Engine on Ubuntu supports overlay2, aufs and btrfs storage drivers.

Docker Engine uses the overlay2 storage driver by default. If you need to useaufs instead, you need to configure it manually.See use the AUFS storage driver

Installation methods

Install Docker Service Ubuntu Windows 10

You can install Docker Engine in different ways, depending on your needs:

  • Most usersset up Docker’s repositories and installfrom them, for ease of installation and upgrade tasks. This is therecommended approach.

  • Some users download the DEB package andinstall it manually and manageupgrades completely manually. This is useful in situations such as installingDocker on air-gapped systems with no access to the internet.

  • In testing and development environments, some users choose to use automatedconvenience scripts to install Docker.

Install using the repository

Before you install Docker Engine for the first time on a new host machine, you needto set up the Docker repository. Afterward, you can install and update Dockerfrom the repository.

Set up the repository

  1. Update the apt package index and install packages to allow apt to use arepository over HTTPS:

  2. Add Docker’s official GPG key:

  3. Use the following command to set up the stable repository. To add thenightly or test repository, add the word nightly or test (or both)after the word stable in the commands below. Learn about nightly and test channels.

    Note: The lsb_release -cs sub-command below returns the name of yourUbuntu distribution, such as xenial. Sometimes, in a distributionlike Linux Mint, you might need to change $(lsb_release -cs)to your parent Ubuntu distribution. For example, if you are using Linux Mint Tessa, you could use bionic. Docker does not offer any guarantees on untestedand unsupported Ubuntu distributions.

Install Docker Engine

  1. Update the apt package index, and install the latest version of DockerEngine and containerd, or go to the next step to install a specific version:

    Got multiple Docker repositories?

    If you have multiple Docker repositories enabled, installingor updating without specifying a version in the apt-get install orapt-get update command always installs the highest possible version,which may not be appropriate for your stability needs.

  2. To install a specific version of Docker Engine, list the available versionsin the repo, then select and install:

    a. List the versions available in your repo:

    b. Install a specific version using the version string from the second column, for example, 5:18.09.1~3-0~ubuntu-xenial.

  3. Verify that Docker Engine is installed correctly by running the hello-worldimage.

    This command downloads a test image and runs it in a container. When thecontainer runs, it prints an informational message and exits.

Docker Engine is installed and running. The docker group is created but no usersare added to it. You need to use sudo to run Docker commands.Continue to Linux postinstall to allow non-privilegedusers to run Docker commands and for other optional configuration steps.

Upgrade Docker Engine

To upgrade Docker Engine, first run sudo apt-get update, then follow theinstallation instructions, choosing the newversion you want to install.

Install Docker Compose On Ubuntu Server 18.04

Install from a package

If you cannot use Docker’s repository to install Docker Engine, you can download the.deb file for your release and install it manually. You need to downloada new file each time you want to upgrade Docker.

Install Docker On Ubuntu 18.04 Server Command

Install Docker On Ubuntu 18.04 Servers

  1. Go to https://download.docker.com/linux/ubuntu/dists/,choose your Ubuntu version, then browse to pool/stable/, choose amd64,armhf, or arm64, and download the .deb file for the Docker Engineversion you want to install.

    Note: To install a nightly or test (pre-release) package,change the word stable in the above URL to nightly or test.Learn about nightly and test channels.

  2. Install Docker Engine, changing the path below to the path where you downloadedthe Docker package.

    The Docker daemon starts automatically.

  3. Verify that Docker Engine is installed correctly by running the hello-worldimage.

    This command downloads a test image and runs it in a container. When thecontainer runs, it prints an informational message and exits.

Docker Engine is installed and running. The docker group is created but no usersare added to it. You need to use sudo to run Docker commands.Continue to Post-installation steps for Linux to allownon-privileged users to run Docker commands and for other optional configurationsteps.

Upgrade Docker Engine

To upgrade Docker Engine, download the newer package file and repeat theinstallation procedure, pointing to the new file.

Install using the convenience script

Docker provides convenience scripts at get.docker.comand test.docker.com for installing edge andtesting versions of Docker Engine - Community into development environments quickly andnon-interactively. The source code for the scripts is in thedocker-install repository.Using these scripts is not recommended for productionenvironments, and you should understand the potential risks before you usethem:

  • The scripts require root or sudo privileges to run. Therefore,you should carefully examine and audit the scripts before running them.
  • The scripts attempt to detect your Linux distribution and version andconfigure your package management system for you. In addition, the scripts donot allow you to customize any installation parameters. This may lead to anunsupported configuration, either from Docker’s point of view or from your ownorganization’s guidelines and standards.
  • The scripts install all dependencies and recommendations of the packagemanager without asking for confirmation. This may install a large number ofpackages, depending on the current configuration of your host machine.
  • The script does not provide options to specify which version of Docker to install,and installs the latest version that is released in the “edge” channel.
  • Do not use the convenience script if Docker has already been installed on thehost machine using another mechanism.

This example uses the script at get.docker.com toinstall the latest release of Docker Engine - Community on Linux. To install the latesttesting version, use test.docker.com instead. Ineach of the commands below, replace each occurrence of get with test.

Warning:

Always examine scripts downloaded from the internet beforerunning them locally.

If you would like to use Docker as a non-root user, you should now consideradding your user to the “docker” group with something like:

Remember to log out and back in for this to take effect!

Warning:

Install Docker On Ubuntu 18.04 Server

Adding a user to the “docker” group grants them the ability to run containerswhich can be used to obtain root privileges on the Docker host. Refer toDocker Daemon Attack Surfacefor more information.

Docker Engine - Community is installed. It starts automatically on DEB-based distributions. OnRPM-based distributions, you need to start it manually using the appropriatesystemctl or service command. As the message indicates, non-root users can’trun Docker commands by default.

Note:

To install Docker without root privileges, seeRun the Docker daemon as a non-root user (Rootless mode).

Upgrade Docker after using the convenience script

If you installed Docker using the convenience script, you should upgrade Dockerusing your package manager directly. There is no advantage to re-running theconvenience script, and it can cause issues if it attempts to re-addrepositories which have already been added to the host machine.

Uninstall Docker Engine

  1. Uninstall the Docker Engine, CLI, and Containerd packages:

  2. Images, containers, volumes, or customized configuration files on your hostare not automatically removed. To delete all images, containers, andvolumes:

How To Install Docker On Ubuntu 18.04 Server

You must delete any edited configuration files manually.

Next steps

Install Docker On Ubuntu 18.04 Server Settings

  • Continue to Post-installation steps for Linux.
  • Review the topics in Develop with Docker to learn how to build new applications using Docker.
Ubunturequirements, apt, installation, ubuntu, install, uninstall, upgrade, update

Docker is a free, open-source and cross-platform containerization tool that helps you to deploy and run the application in an isolated environment. Docker has become one of the most important parts of modern software development and DevOps pipelines.

In this tutorial, you will learn –

Prerequisites

  • A server running Ubuntu 20.04.
  • A root password is configured on your server.

Install Docker on Ubuntu

There are two ways to install Docker on Ubuntu 20.04. You can install Docker from the Ubuntu default repository or from the Docker’s official repository. The latest version of Docker is not included in the Ubuntu default repository. So it is always recommended to install Docker from Docker’s official repository.

In this section, we will show you how to install Docker on Ubuntu from Docker official repository.

Step 1 – Install Required Dependencies

First, you will need to install some prerequisite packages in your system. You can install them by running the following command:

Step 2 – Add Docker Official Repository

Next, you will need to import the GPG key and add the Docker repository to your system.

First, import the GPG key with the following command:

Next, add the Docker official repository using the following command:

Once the repository is added, update the repository cache with the following command:

Step 3 – Install Docker Ubuntu

Once the repository is updated, you can install the Docker on Ubuntu by running the following command:

This command will install the latest version of Docker from the Docker official repository.

Step 4 – Verify Docker Version

Once the Docker has been installed, you can verify the installed version of Docker with the following command:

You should get the following output:

Step 5 – Install a Specific Docker Version

If you want to install a specific Docker version, first list all available Docker versions using the following command:

Install Docker Service Ubuntu Linux

You should see all the Docker version in the following output:

Now, install the specific version of Docker by adding =version after package name as shown below:

Step 6 – Manage Docker Services

To start the Docker service, run the following command:

To enable the Docker service at system reboot, run the following command:

To check the status of Docker service, run the following command:

Run Docker Commands Without Sudo

By default, Docker can be run as a root user or with Sudo privileges. If you want to run Docker commands as a non-root user then you will need to add your user to the docker group.

You can add your user to the docker group using the following command:

Now, your user can run Docker commands without specifying sudo.

Docker Basic Commands

You can list all commands available in Docker with the following command:

You should get a list of all commands in the following output:

To see system-wide information about Docker, run the following command:

Output:

How to Use Docker

At this point, Docker is installed and running in your system. Next, you will need to check whether you can access and download the image from DockerHub.

Let’s download the hello-world image from the DockerHub using the docker pull command:

Install Docker Service Ubuntu

This will download or pull the hello-world image from the DockerHub repository as shown below:

Next, verify the downloaded image with the following command :

You should see your downloaded image in the following output:

Next, run a container from the hello-world image with the following command:

You should see the following output:

How to Uninstall Docker

If you want to uninstallDocker from your system. It is recommended to remove all Docker containers, images and volumes from your system.

First, stop all running containers with the following command:

Once all containers are stopped, remove them with the following command:

Next, remove all Docker images with the following command:

Next, remove all docker objects with the following command:

Finally, remove the Docker package with all dependencies by running the following command:

Conclusion

In the above post, you learned how to install and use Docker on Ubuntu 20.04. To learn more about Docker, check out my all Docker tutorial.