Install Docker on Ubuntu

Install Docker on Ubuntu 14.04 LTS

1. Check current kernel version use  uname -r

uname -r
3.19.0-25-generic

2. Update apt source.

apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D

3. Open /etc/apt/sources.list.d/docker.list file and Remove existing entries.

vi /etc/apt/sources.list.d/docker.list

  if the file doesn't exist, create it.

  

4. Add below enties.  

   deb https://apt.dockerproject.org/repo ubuntu-trusty main

5. Save and close. 

6. Update Ubuntu pakage

   Docker#apt-get update

7. install both the required and optional packages.

   Docker#apt-get install linux-image-generic-lts-trusty

8. reboot your host

    Docker#reboot

Install Docker

1. Login your Ubuntu Host, as a root or user with sudo privileges.

   apt-get update

2. Install Docker

   apt-get install docker-engine

3. Verifi Docker Service running.

service docker start
start: Job is already running: docker
docker -v
Docker version 1.9.1, build a34a1d5

참고 : https://docs.docker.com/engine/installation/ubuntulinux/