What is Docker?

Docker is a popular open source containerization tool used to provide a portable and consistent runtime environment for software applications, while consuming less resources than a traditional server or virtual machine. Docker uses containers, isolated user-space environments that run at the operating system level and share system resources such as the kernel and the filesystem. Continue reading “What is Docker?”

What is a Virtual Machine?

A virtual machine, also commonly referred to as VM, is a guest system running on top of a virtualization software or hypervisor. VirtualBox, VMWare, and QEMU are examples of popular tools that are able to emulate network, disk, and other hardware resources to build virtualized environments that behave as physical computers. These environments are isolated from each other and from the host where the virtualization software is installed, each running distinct operating systems. Continue reading “What is a Virtual Machine?”