It’s not virtualization, it’s namespaces. Docker makes use of Linux kernel features; started out with cgroups and now uses libcontainer. Each container is running in its own isolated(ish) namespace on the same host kernel.
It’s _very_ different technology than virtualization.
You don’t need docker to make a container on Linux (or Solaris for that matter).
It’s _very_ different technology than virtualization.
You don’t need docker to make a container on Linux (or Solaris for that matter).