Docker installation

follow below step after ou have an host machien at your end be it Cloud or on premise or a dev box, you cant use ubuntu trysty on vagrant+virtualbox 

Step 1.

ubuntu@ip-xxx-xx-x-xxx:~$ sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
 Executing: gpg --ignore-time-conflict --no-options --no-default-keyring --homedir /tmp/tmp.jNZLKNnKte --no-auto-check-trustdb --trust-model always --keyring /etc/apt/trusted.gpg --primary-keyring /etc/apt/trusted.gpg --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
 gpg: requesting key 2C52609D from hkp server p80.pool.sks-keyservers.net
 gpg: key 2C52609D: public key "Docker Release Tool (releasedocker) <docker@docker.com>" imported
 gpg: Total number processed: 1
 gpg:               imported: 1  (RSA: 1)
 
 Step 2: 
 
  ubuntu@ip-xxx-xx-x-xxx:~$ sudo vi /etc/apt/sources.list.d/docker.list
  
Step 3:
 ubuntu@ip-xxx-xx-x-xxx:~$ sudo apt-get update
 
Step 4:
ubuntu@ip-172-31-0-151:~$ sudo apt-cache policy docker-engine
Step 5: 
For Ubuntu Trusty (and some other versions), it’s recommended to install the linux-image-extra kernel package, which allows you use the aufs storage driver, so we’ll do that now.
ubuntu@ip-xxx-xx-x-xxx:~$ sudo apt-get update
    ubuntu@ip-172-31-0-151:~$ sudo apt-get install linux-image-extra-$(uname -r)
Step 6. Install Docker Engine 
 ubuntu@ip-xxx-xx-x-xxx:~$ sudo apt-get update
 ubuntu@ip-xxx-xx-x-xxx:~$ sudo apt-get install docker-engine
 Step 7: Start docker daemon
 ubuntu@ip-xxx-xx-x-xxx:~$ sudo service docker start
 
 Step 8 L: Test installation
 ubuntu@ip-xxx-xx-x-xxx:~$ sudo docker run hello-world


REf:
https://docs.docker.com/engine/installation/linux/ubuntulinux/
https://docs.docker.com/engine/installation/cloud/cloud-ex-aws/