At Red Hat we like to say, "Containers are Linux—Linux is Containers." Here is what this means. Traditional containers are processes on a system that usually have the following three characteristics: 1. Resource constraints When you run lots of containers on a system, you do not want to have any container monopolize the operating system, so we use resource constraints to control things like CPU, m
![A history of low-level Linux container runtimes](https://cdn-ak-scissors.b.st-hatena.com/image/square/7a91b0fbe1e378b5b51cb0acc087e1b9cfa98a2a/height=288;version=1;width=512/https%3A%2F%2Fopensource.com%2Fsites%2Fdefault%2Ffiles%2Flead-images%2Frunning-containers-two-ship-container-beach.png)