How to boot into Rescue Mode or Emergency Mode CentOS / RHEL / Ubuntu

This article explain Rescue Mode and Emergency and also explain how to boot Ubuntu into these modes.

This Article explain how to boot CentOS/ RHEL 7 into rescue or emergency mode

I found it very useful hence sharing here

Play with Docker

The Play with Docker classroom  is a nice tool for newbies to learn containers/Docker. Give it a try