Let's review Docker
>All of the features which it claims to be helpful are>either useless or poorly implemented, and it's primary>benefits can be easily achieved using namespaces directly.any tutorial ? For me the docker is very easy.and there are some new alternatives:- LXD :   https://lists.linuxcontainers.org/pipermail/lxc-devel/2014-N...- Rocket: https://coreos.com/blog/rocket/- Flockport : http://www.flockport.com/faqs/- Spoon : https://spoon.net/docs/getting-started/spoon-and-docker