Containers run on single kernel. In other words all containers have single kernel. Whereas on other hand hypervisors have multiple kernals. Each virtual machine runs on different kernel.

And "docker run ubuntu" is just like to creating chroot environment.

Containers run on single kernel. In other words all containers have single kernel (Host OS). Whereas on other hand hypervisors have multiple kernals. Each virtual machine runs on different kernel.

And "docker run ubuntu" is just like to creating chroot environment.