Container-Docker Getting Started Guide

1. What are Linux containers? 2. What is Docker? 3. How can I find images? 3.1 General / "Safety" information about trusting images you have not made yourself 3.1.A resist the temptation to SSH into another machine or git push from a shell in a docker container / image not built by yourself 4. How do I make my own image? 5. How can I use my Image / Container? 6. How can I save the changes in my container, or call the same container over and over? 7. How do I clean up all these containers laying around?