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by e12e 1977 days ago
Linux containers are containers, not VMs. They are more like docker (although, lxd/lxc typically are used more like jails/VMs - a "full" user land, rather than just an application binary, like with a docker container wrapping a service implemented in go).

Technically, docker/lxc uses kernel namespaces to isolate a process tree - firecracker starts up a virtual machine.