How To Install Docker on Ubuntu 18.04 & 16.04 LTS

Docker is a container-based application framework that allows deploying programs that are run as containers. They’re similar to virtual machines, but containers are more portable, more resource-friendly, and more dependent on the host operating system.

See Also:

• What is Docker & Docker Container?
• How To Install Docker CE on CentOS/RHEL 7/6

• 1. Uninstall Old Versions

  First remove any default Docker packages from the system. Execute mention command to remove old packages.

  # sudo apt-get purge docker lxc-docker docker-engine docker.io
  

  2. Prerequisites

  Now install the required packages on your system for installing Docker on Ubuntu.

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

  3. Add Docker Repository

  Now import docker official GPG key using before adding the repository.

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

  After that add the Docker GPG key on your system use-mention command to add the repository.

  # sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
  

  4. Install Docker on Ubuntu

  Now your system is ready to install Docker community edition on ubuntu system.

  # sudo apt-get update
  # sudo apt-get install docker-ce
  

  5: Start Docker Service

  After, Docker package has been installed, start the docker service and enable it at boot time using the below commands:

  On Ubuntu 18.04

  # systemctl start docker
  # systemctl enable docker
  

  On Ubuntu 16.04

  # service docker start
  # chkconfig dokcer on
  

  6: Check Docker Version

  Run mention command to check the docker version.

  # docker version
  

  Client:
   Version:           18.09.1
   API version:       1.39
   Go version:        go1.10.6
   Git commit:        4c52b90
   Built:             Wed Jan  9 19:35:31 2019
   OS/Arch:           linux/amd64
   Experimental:      false
  
  Server: Docker Engine - Community
   Engine:
    Version:          18.09.1
    API version:      1.39 (minimum version 1.12)
    Go version:       go1.10.6
    Git commit:       4c52b90
    Built:            Wed Jan  9 19:02:44 2019
    OS/Arch:          linux/amd64
    Experimental:     false
  

  7: Check Docker Info

  Now, you can check some docker info using mention command.

  # docker info
  

  Containers: 1
   Running: 0
   Paused: 0
   Stopped: 1
  Images: 1
  Server Version: 18.09.1
  Storage Driver: overlay2
   Backing Filesystem: extfs
   Supports d_type: true
   Native Overlay Diff: true
  Logging Driver: json-file
  Cgroup Driver: cgroupfs
  Plugins:
   Volume: local
   Network: bridge host macvlan null overlay
   Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
  Swarm: inactive
  Runtimes: runc
  Default Runtime: runc
  Init Binary: docker-init
  containerd version: 9754871865f7fe2f4e74d43e2fc7ccd237edcbce
  runc version: 96ec2177ae841256168fcf76954f7177af9446eb
  init version: fec3683
  Security Options:
   apparmor
   seccomp
    Profile: default
  Kernel Version: 4.15.0-43-generic
  Operating System: Ubuntu 18.04.1 LTS
  OSType: linux
  Architecture: x86_64
  CPUs: 1
  Total Memory: 1.947GiB
  Name: docker
  ID: WRRO:URTU:SU5I:7GN4:K432:RTO5:5WCZ:2VT6:TCXJ:XT5B:EVCQ:NLBD
  Docker Root Dir: /var/lib/docker
  Debug Mode (client): false
  Debug Mode (server): false
  Registry: https://index.docker.io/v1/
  Labels:
  Experimental: false
  Insecure Registries:
   127.0.0.0/8
  Live Restore Enabled: false
  Product License: Community Engine
  

  8: Test Docker

  Run the Docker hello-world container to test if the installation completed successfully.

  # docker run hello-world
  

  

  Enjoy it!