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I'm a student who is studying Docker first time and uses to Virtual Machine. I've understood when I use virtual machines on my laptop, the layer is Application -> Guest OS -> Hypervisor -> Host OS and in case of Docker Application -> Docker Engine -> Host OS

It didn't make me confused, but I found I can connect docker containers' shell. And if I use 'ubuntu image,' container's shell looks like ubuntu's bash shell.
So I'm confused about what's different with VM and container. Both VM and container have each operating system, and I can connect through "SSH" or "docker attach."

What's different with Docker's OS image such as Ubuntu and Guest OS in VM?

Suhwan Cha
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    Possible duplicate of [How is Docker different from a virtual machine?](https://stackoverflow.com/questions/16047306/how-is-docker-different-from-a-virtual-machine) – Boris van Katwijk Apr 04 '19 at 14:03
  • [Cgroups, namespaces, and beyond: what are containers made from?](https://www.youtube.com/watch?v=sK5i-N34im8) by Jérôme Petazzoni – tgogos Apr 04 '19 at 14:16

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Docker container processes run on the host kernel but VM runs processes in guest kernel. You can see container processes by executing ps aux on host machine.

Akash Sharma
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