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Unlike virtual machines, Docker containers don’t use hardware virtualization. Programs running inside Docker containers interface directly with the host’s Linux kernel. Because there’s no additional layer between the program running inside the container and the computer’s operating system, no resources are wasted by running redundant software or simulating virtual hardware. This is an important distinction. Docker is not a virtualization technology. Instead, it helps you use the container technology already built into your operating system.


Cover of Docker in Action


Docker is not a virtulization technology…