Docker installation on CentOS 7

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To install docker on CentOS 7 use following steps:

1. Update CentOS 7 fully as default CentOS 7 kernel does not works well with latest docker

   yum -y update --skip-broken

2. Reboot the machine to boot into latest kernel
3. Install epel-release and install docker using epel

   yum -y install epel-release
   yum -y install docker

4. Start docker and also Enable it to run on startup

   systemctl start docker.service
   systemctl enable docker.service

5. Run hello-world example

   docker run hello-world

Some steps learned from http://www.itzgeek.com/how-tos/linux/centos-how-tos/installing-docker-on-centos-7-rhel-7-fedora-21.html

Official documentation on docker installation for CentOS 7 is at https://docs.docker.com/installation/centos/

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