rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
rpm -Uvh http://www.elrepo.org/elrepo-release-6-8.el6.elrepo.noarch.rpm
yum --enablerepo=elrepo-kernel install kernel-lt
nano /etc/grub.conf # change default = 1 to default = 0
shutdown -r 0
rpm -iUvh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
yum update -y
yum -y install docker-io
docker -d
مرجع: https://medium.com/@NMeyen/installing-docker-on-centos-6-x-811f5ec06652
