This tutorial will show you how to install Docker on Ubuntu 16.04. If you are new to Docker, you may want to read more about Docker on this page. You will find all information you need about Docker. Before we go through the Docker installation, we need to ensure that our system meets the Docker requirements.
Docker Requirements
- 64 bit system
- Minimum Kernel version 3.10
If you are gonna install Docker on Ubuntu 16.04, both above requirements should be full filled by default. So we can continue to the next step.
Steps to install Docker on Ubuntu 16.04
Step 1. Update APT Sources
Before we add the apt sources, we need to ensure that the APT works with https mode. So, we need to install the CA certificate.
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sudo apt-get update sudo apt-get install apt-transport-https ca-certificates |
Next, add the GPG key
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sudo apt-key adv --keyserver hkp://ha.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D |
Add the Docker repository
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echo "deb https://apt.dockerproject.org/repo ubuntu-xenial main" | sudo tee /etc/apt/sources.list.d/docker.list |
Now update Ubuntu repository
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sudo apt-get update |
Verify the Docker repository
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apt-cache policy docker-engine |
It should print something like this:
root@onlyoffice:/home/dhani# apt-cache policy docker-engine
docker-engine:
Installed: (none)
Candidate: 1.12.3-0~xenial
Version table:
1.12.3-0~xenial 500
500 https://apt.dockerproject.org/repo ubuntu-xenial/main amd64 Packages
1.12.2-0~xenial 500
500 https://apt.dockerproject.org/repo ubuntu-xenial/main amd64 Packages
1.12.1-0~xenial 500
500 https://apt.dockerproject.org/repo ubuntu-xenial/main amd64 Packages
1.12.0-0~xenial 500
500 https://apt.dockerproject.org/repo ubuntu-xenial/main amd64 Packages
1.11.2-0~xenial 500
500 https://apt.dockerproject.org/repo ubuntu-xenial/main amd64 Packages
1.11.1-0~xenial 500
500 https://apt.dockerproject.org/repo ubuntu-xenial/main amd64 Packages
1.11.0-0~xenial 500
500 https://apt.dockerproject.org/repo ubuntu-xenial/main amd64 Packages
Step 2. Install Docker
Use this command to start install prerequisites file needed by Docker engine
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sudo apt-get update sudo apt-get install linux-image-extra-$(uname -r) linux-image-extra-virtual |
Now install Docker with this command
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sudo apt-get install docker-engine |
Start Docker daemon
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sudo service docker start |
To see the docker status use, status command
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sudo service docker status |
Output:
root@onlyoffice:/home/dhani# service docker status
docker.service – Docker Application Container Engine
Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
Active: active (running) since Fri 2016-11-18 10:51:54 WITA; 44s ago
Docs: https://docs.docker.com
Main PID: 2539 (dockerd)
CGroup: /system.slice/docker.service
├─2539 /usr/bin/dockerd -H fd://
└─2549 docker-containerd -l unix:///var/run/docker/libcontainerd/docker-containerd.sock –shim docker-containerd-shim –metrics-interval=0 –start-timeout 2mNov 18 10:51:53 onlyoffice dockerd[2539]: time=”2016-11-18T10:51:53.975785748+08:00″ level=warning msg=”Your kernel does not support swap memory limit.”
Nov 18 10:51:53 onlyoffice dockerd[2539]: time=”2016-11-18T10:51:53.976428611+08:00″ level=info msg=”Loading containers: start.”
Nov 18 10:51:54 onlyoffice dockerd[2539]: time=”2016-11-18T10:51:54.077890844+08:00″ level=info msg=”Firewalld running: false”
Nov 18 10:51:54 onlyoffice dockerd[2539]: time=”2016-11-18T10:51:54.360115410+08:00″ level=info msg=”Default bridge (docker0) is assigned with an IP address 172.17.0.0/
Nov 18 10:51:54 onlyoffice dockerd[2539]: time=”2016-11-18T10:51:54.554319440+08:00″ level=info msg=”Loading containers: done.”
Nov 18 10:51:54 onlyoffice dockerd[2539]: time=”2016-11-18T10:51:54.554496079+08:00″ level=info msg=”Daemon has completed initialization”
Nov 18 10:51:54 onlyoffice dockerd[2539]: time=”2016-11-18T10:51:54.554511023+08:00″ level=info msg=”Docker daemon” commit=6b644ec graphdriver=aufs version=1.12.3
Nov 18 10:51:54 onlyoffice systemd[1]: Started Docker Application Container Engine.
Nov 18 10:51:54 onlyoffice dockerd[2539]: time=”2016-11-18T10:51:54.559246954+08:00″ level=info msg=”API listen on /var/run/docker.sock”
Nov 18 10:52:32 onlyoffice systemd[1]: Started Docker Application Container Engine.
Verify the installation
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sudo docker run hello-world |
Done. Now Docker is installed on Ubuntu 16.04 and ready for use.
