Update Docker Ubuntu 18.04

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.

Estimated reading time: 10 minutes

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

Prerequisites

OS requirements

Jun 10, 2019 A system running Ubuntu 18.04; A user account with sudo privileges; Docker installed on Ubuntu 18.04; A command-line/terminal window (Ctrl-Alt-T) Steps for Installing Docker Compose on Ubuntu Update Software Repositories and Packages. Start by updating the software repositories and software packages. Open a terminal window, and enter the following. This tutorial will help you set up Docker and Nvidia-Docker 2 on Ubuntu 18.04. Docker is a tool designed to make it easier to create, deploy, and run applications by using containers. Docker was popularly adopted by data scientists and machine learning developers since its inception in 2013.

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

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

Install Docker On Ubuntu

  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.

Upgrade Docker Ubuntu 18.04

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.
requirements, apt, installation, ubuntu, install, uninstall, upgrade, update

Ubuntu 20.04 LTS (Focal Fossa) was officially released on April 23. This is the latest Ubuntu Long Term Support (LTS) release, with security patches and updates available until 2025. If you are currently using an older version of Ubuntu, you may be interested in upgrading.

In this tutorial, we will show how to safely upgrade from Ubuntu 18.04 LTS (Bionic Beaver), the previous LTS, to the current one. We will explain several methods by which you can achieve this, including some advanced tips and tricks that can help you further customise your upgrade process.

There are several things you need to take into account before you go forward with the upgrade:

  • The upgrade process can be done using the Ubuntu update manager or on the command line. The Ubuntu update manager will start showing a prompt for an upgrade to 20.04 once the first dot release of Ubuntu 20.04 LTS (i.e. 20.04.1) is released. The typical timeframe for this is around three months after the official release.
    Once this functionality is enabled, you will see a prompt like this one:

You can still do an upgrade right now, though. However, the process at the moment involves some use of the command line, and therefore requires some level of technical knowledge and confidence. If you are not sure about any of the steps or methods outlined below, you might want to wait for the dot release.

  • If you do want to proceed with the upgrade, you can launch the graphical guided wizard from the command line, or complete the entire process using the latter. In this tutorial, we will demonstrate both options.
  • Please make sure to back up your data. Upgrades are normally safe, but there is always a chance something may go wrong. It is crucial that you have your personal files safely copied to a backup location, so you can restore them if there are any problems or complications. There are several ways you can do this:
    • Ubuntu has its own backup tool, which you can turn on.
    • You can also manually copy important files to a different device (second hard disk, USB drive, another computer on the network, etc). You can copy the files manually or use a data backup/replication tool. Good examples for simple, friendly tools of this nature are Timeshift and Grsync. On the command-line, you can use tar or rsync.
  • You can also create a full system image of your Ubuntu installation with a dedicated system imaging software like CloneZilla.
  • If you want to double-check everything works well on your hardware, you can download the Ubuntu 20.04 LTS ISO image, copy it to a USB drive using a live media creation tool like Ubootnetin, and then start your computer in an Ubuntu 20.04 LTS live session.
  • Please make sure your computer has sufficient free disk space. By default, for the best experience, you should have 25 GB of free space for a new installation of Ubuntu. With version upgrades, you can get by with less free disk space, but the process could take longer.
  • The upgrade process can take some time. You should not interrupt or cancel the process, as it may leave the system in an unstable state. If you are using a battery-powered device, like a laptop, it is advisable to use the charger.

Update Docker Ubuntu 18.04 64-bit

As we mentioned earlier, the Ubuntu update manager will start showing upgrade notifications to users roughly three months after the official release. However, it is possible to upgrade Ubuntu 18.04 LTS without having to wait.

This entails running a command in a terminal window, which will then launch the graphical guided wizard.

If you are not comfortable with this path, it is best to continue running Ubuntu 18.04 LTS until the availability of the upgrade offer through the update manager. The sequence of actions below requires some familiarity with the command-line usage, so it’s best suited for people like developers, administrators or more skilled techies.

The command to start is do-release-upgrade, executed with specific options.

To better understand what we are going to do, you can check what options are available in the do-release-update tool by running the command with the -h flag:

Specifically, the important options are:

Update Docker Ubuntu 18.04 Free

  • -d – this allows us to upgrade to 20.04; normally, this option is used by early testers to try development versions of Ubuntu ahead of their official release. We will use it to start the upgrade. While the labels say “development”, don’t worry – we will in fact be upgrading to the stable, official release of Ubuntu 20.04 LTS.
  • -f – this option will launch a graphical guided wizard. Without it, the do-release-upgrade tool will run in the command-line. The process is otherwise identical.

Another useful option is –allow-third-party. We will talk about it a bit more in the section titled ‘Advanced options & third-party software’. If your Ubuntu setup includes applications from sources other than the standard Ubuntu repository archives, you may want to include this option to preserve and carry over your third-party applications.

Therefore, to start the upgrade to Ubuntu 20.04 LTS using a GUI tool, the full command we need is then:

This will launch the upgrade process using a Gtk3-based GUI.

The wizard will ask you several questions, and run through several steps:

Docker

You may be asked one or two questions during the upgrade, specifically if you want to retain existing settings for certain system files (like timezone configuration). If you are not sure, you can safely proceed with the default answer.

After a while, the upgrade should complete, and you should see yourself logged into the 20.04 desktop!

Advanced options & third-party software

For most users, the flow described above will be sufficient. However, you can further customise it, which is particularly useful for those using third-party software that is installed from software channels outside the standard Ubuntu archives. For instance, if you’ve installed the Google Chrome, Skype or VirtualBox software manually, the updates for these applications are provided through separate repositories.

By default, non-Ubuntu software channels will be disabled during the upgrade. You will need to manually enable them after the upgrade is completely. Alternatively, you can instruct the upgrade tool to allow these additional packages.

Update Docker Ubuntu 18.04 Download

This can be done by running do-release-upgrade with the –allow-third-party flag, as mentioned earlier.

Alternative options to upgrade

You can start the graphical guided wizard upgrade process in several other ways.

Ubuntu Download

On the command line, you can run update-manager -c to initiate the upgrade. Like the do-release-update tool, you can run the above with the optional -d flag to get the “development” release ahead of the 20.04.1 availability.

On the command line, you can also run /usr/lib/ubuntu-release-upgrader/check-new-release-gtk.

In general, you can control what Ubuntu release upgrades are available, regardless of which tool you use and run. This can be done by editing the following configuration file:

Here, you can check the line Prompt=XXXX, whereby:

  • never – no upgrades will be offered.
  • normal – supported release that immediately succeeds the currently running release will be offered.
  • lts – LTS releases will be offered.

The upgrade process on the command-line is very similar to what we have already done. The only difference is no GUI will be launched and you will be asked Y/N questions in the terminal window.

Once complete, you will be logged into the 20.04 desktop:

In this guide, we laid out several methods for upgrading from Ubuntu 18.04 LTS to 20.04 LTS. These include both visual tools, i.e. graphical wizards, and command-line utilities, which are often best suited for more skilled users. The Ubuntu update manager will start prompting users in about three months, but if you want to upgrade your system now, we also outlined the steps you will need to get underway.

If you are still undecided about the upgrade, and would like to learn more, you may want to sign up for a webinar highlighting the new features and technologies available in Ubuntu 20.04.

We hope you will find this tutorial valuable and useful, and we hope you enjoy your new desktop experience.

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