Install Docker
Docker requires a 64-bit installation regardless of your Ubuntu version. Additionally, your kernel must be 3.10 at minimum. The latest 3.10 minor version or a newer maintained version are also acceptable.
To check your current kernel version, open a terminal and use uname -r to display your kernel version:
uname -r
Update your apt sources
Docker’s APT repository contains Docker 1.7.1 and higher. To set APT to use packages from the new repository:
sudo apt-get install apt-transport-https ca-certificates
Add the new GPG key.
$ sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
Apt sources
Add the line
deb https://apt.dockerproject.org/repo ubuntu-trusty main
to /etc/apt/sources.list.d/docker.list file
Prerequisites by Ubuntu Version
Install the following pre-requisites
sudo apt-get install linux-image-extra-$(uname -r)
sudo apt-get install apparmor
Install Docker
Run the below command to install docker
sudo apt-get install docker-engine
Start the docker daemon
sudo service docker start
verify the docker is installed properly
sudo docker run hello-world
Uninstallation
sudo apt-get purge docker-engine
sudo apt-get autoremove --purge docker-engine
rm -rf /var/lib/docker
References
- https://docs.docker.com/engine/installation/linux/ubuntulinux/